/*
 * @Author:             cmk666
 * @Created time:       2024-03-11 07:57:54
 * @Last Modified time: 2024-03-11 08:32:10
 */
#pragma GCC optimize("Ofast", "unroll-loops")
#include<bits/stdc++.h>
#ifdef LOCAL
#include"debug.h"
#else
#define D(...) ((void)0)
#endif
using namespace std; using ll = long long;
#define For(i, j, k) for ( int i = (j) ; i <= (k) ; i++ )
#define Fol(i, j, k) for ( int i = (j) ; i >= (k) ; i-- )
namespace FastIO
{
// ------------------------------
// #define IN_HAS_NEG
// #define OUT_HAS_NEG
// #define CHK_EOF
// #define DISABLE_MMAP
// ------------------------------
#if __cplusplus < 201400
#error Please use C++14 or higher.
#endif
#if __cplusplus > 201700
#define INLINE_V inline
#else
#define INLINE_V
#endif
#if ( defined(LOCAL) || defined(_WIN32) ) && !defined(DISABLE_MMAP)
#define DISABLE_MMAP
#endif
#ifndef DISABLE_MMAP
#include<sys/mman.h>
#endif
#ifdef LOCAL
	inline char gc() { return getchar(); }
	inline void pc(char c) { putchar(c); }
#else
#ifdef DISABLE_MMAP
	INLINE_V constexpr int _READ_SIZE = 1 << 18;
	INLINE_V static char _read_buffer[_READ_SIZE], *_read_ptr = nullptr, *_read_ptr_end = nullptr;
	inline char gc()
	{
		if ( __builtin_expect(_read_ptr == _read_ptr_end, false) )
		{
			_read_ptr = _read_buffer;
			_read_ptr_end = _read_buffer + fread(_read_buffer, 1, _READ_SIZE, stdin);
#ifdef CHK_EOF
			if ( __builtin_expect(_read_ptr == _read_ptr_end, false) ) return EOF;
#endif
		}
		return *_read_ptr++;
	}
#else
	INLINE_V static const char *_read_ptr = (const char *)mmap(nullptr, INT_MAX, 1, 2, 0, 0);
	inline char gc() { return *_read_ptr++; }
#endif
	INLINE_V constexpr int _WRITE_SIZE = 1 << 18;
	INLINE_V static char _write_buffer[_WRITE_SIZE], *_write_ptr = _write_buffer;
	inline void pc(char c)
	{
		*_write_ptr++ = c;
		if ( __builtin_expect(_write_buffer + _WRITE_SIZE == _write_ptr, false) )
		{
			fwrite(_write_buffer, 1, _write_ptr - _write_buffer, stdout);
			_write_ptr = _write_buffer;
		}
	}
	INLINE_V struct _auto_flush
	{
		inline ~_auto_flush() { fwrite(_write_buffer, 1, _write_ptr - _write_buffer, stdout); }
	}	_auto_flush;
#endif
#ifdef CHK_EOF
	inline constexpr bool _isdigit(char c) { return ( c & 16 ) && c != EOF; }
	inline constexpr bool _isgraph(char c) { return c > 32 && c != EOF; }
#else
	inline constexpr bool _isdigit(char c) { return c & 16; }
	inline constexpr bool _isgraph(char c) { return c > 32; }
#endif
	template < class T >
	INLINE_V constexpr bool _is_integer = numeric_limits < T >::is_integer;
	template < class T >
	INLINE_V constexpr bool _is_signed = numeric_limits < T >::is_signed;
	template < class T >
	INLINE_V constexpr bool _is_unsigned = _is_integer < T > && !_is_signed < T >;
	template <> INLINE_V constexpr bool _is_integer < __int128 > = true;
	template <> INLINE_V constexpr bool _is_integer < __uint128_t > = true;
	template <> INLINE_V constexpr bool _is_signed < __int128 > = true;
	template <> INLINE_V constexpr bool _is_unsigned < __uint128_t > = true;
#undef INLINE_V
	inline void read(char &c) { do c = gc(); while ( !_isgraph(c) ); }
	inline void read_cstr(char *s)
	{
		char c = gc(); while ( !_isgraph(c) ) c = gc();
		while ( _isgraph(c) ) *s++ = c, c = gc();
		*s = 0;
	}
	inline void read(string &s)
	{
		char c = gc(); s.clear(); while ( !_isgraph(c) ) c = gc();
		while ( _isgraph(c) ) s.push_back(c), c = gc();
	}
#ifdef IN_HAS_NEG
	template < class T, enable_if_t < _is_signed < T >, int > = 0 >
	inline void read(T &x)
	{
		char c = gc(); bool f = true; x = 0;
		while ( !_isdigit(c) ) { if ( c == 45 ) f = false; c = gc(); }
		if ( f ) while ( _isdigit(c) ) x = x * 10 + ( c & 15 ), c = gc();
		else     while ( _isdigit(c) ) x = x * 10 - ( c & 15 ), c = gc();
	}
	template < class T, enable_if_t < _is_unsigned < T >, int > = 0 >
#else
	template < class T, enable_if_t < _is_integer < T >, int > = 0 >
#endif
	inline void read(T &x)
	{
		char c = gc(); while ( !_isdigit(c) ) c = gc();
		x = 0; while ( _isdigit(c) ) x = x * 10 + ( c & 15 ), c = gc();
	}
	inline void write(char c) { pc(c); }
	inline void write_cstr(const char *s) { while ( *s ) pc(*s++); }
	inline void write(const string &s) { for ( char c : s ) pc(c); }
#ifdef OUT_HAS_NEG
	template < class T, enable_if_t < _is_signed < T >, int > = 0 >
	inline void write(T x)
	{
		char buffer[numeric_limits < T >::digits10 + 1]; int digits = 0;
		if ( x >= 0 )  do buffer[digits++] =  ( x % 10 ) | 48, x /= 10; while ( x );
		else { pc(45); do buffer[digits++] = -( x % 10 ) | 48, x /= 10; while ( x ); }
		while ( digits ) pc(buffer[--digits]);
	}
	template < class T, enable_if_t < _is_unsigned < T >, int > = 0 >
#else
	template < class T, enable_if_t < _is_integer < T >, int > = 0 >
#endif
	inline void write(T x)
	{
		char buffer[numeric_limits < T >::digits10 + 1]; int digits = 0;
		do buffer[digits++] = ( x % 10 ) | 48, x /= 10; while ( x );
		while ( digits ) pc(buffer[--digits]);
	}
	template < int N > struct _tuple_io_helper
	{
		template < class ...T >
		static inline void _read(tuple < T... > &x)
		{ _tuple_io_helper < N - 1 >::_read(x), read(get < N - 1 > (x)); }
		template < class ...T >
		static inline void _write(const tuple < T... > &x)
		{ _tuple_io_helper < N - 1 >::_write(x), pc(32), write(get < N - 1 > (x)); }
	};
	template <> struct _tuple_io_helper < 1 >
	{
		template < class ...T >
		static inline void _read(tuple < T... > &x) { read(get < 0 > (x)); }
		template < class ...T >
		static inline void _write(const tuple < T... > &x) { write(get < 0 > (x)); }
	};
	template < class ...T >
	inline void read(tuple < T... > &x) { _tuple_io_helper < sizeof...(T) >::_read(x); }
	template < class ...T >
	inline void write(const tuple < T... > &x) { _tuple_io_helper < sizeof...(T) >::_write(x); }
	template < class T1, class T2 >
	inline void read(pair < T1, T2 > &x) { read(x.first), read(x.second); }
	template < class T1, class T2 >
	inline void write(const pair < T1, T2 > &x) { write(x.first), pc(32), write(x.second); }
	template < class T1, class ...T2 >
	inline void read(T1 &x, T2 &...y) { read(x), read(y...); }
	template < class ...T >
	inline void read_cstr(char *x, T *...y) { read_cstr(x), read_cstr(y...); }
	template < class T1, class ...T2 >
	inline void write(const T1 &x, const T2 &...y) { write(x), write(y...); }
	template < class ...T >
	inline void write_cstr(const char *x, const T *...y) { write_cstr(x), write_cstr(y...); }
	template < class T >
	inline void print(const T &x) { write(x); }
	inline void print_cstr(const char *x) { write_cstr(x); }
	template < class T1, class ...T2 >
	inline void print(const T1 &x, const T2 &...y) { print(x), pc(32), print(y...); }
	template < class ...T >
	inline void print_cstr(const char *x, const T *...y) { print_cstr(x), pc(32), print_cstr(y...); }
	inline void println() { pc(10); }
	inline void println_cstr() { pc(10); }
	template < class ...T >
	inline void println(const T &...x) { print(x...), pc(10); }
	template < class ...T >
	inline void println_cstr(const T *...x) { print_cstr(x...), pc(10); }
}
using namespace FastIO;
template < int P_ > class Modint
{
	using MI = Modint;
	inline Modint(int x, int) : v(x) {}
	inline static int add(int x) { return x < P ? x : x - P; }
	inline static int sub(int x) { return x >= 0 ? x : x + P; }
public:
	static constexpr int P = P_; int v;
	inline Modint() : v(0) {}
	inline Modint(const MI &x) : v(x.v) {}
	template < class T, enable_if_t < numeric_limits < T >::is_integer, int > = 0 >
	inline Modint(T x) : v(sub(x % P)) {}
	template < class T, enable_if_t < numeric_limits < T >::is_integer, int > = 0 >
	explicit inline operator T()const { return v; }
	inline friend bool operator==(const MI &x, const MI &y) { return x.v == y.v; }
	inline friend bool operator!=(const MI &x, const MI &y) { return x.v != y.v; }
	inline MI &operator=(const MI &x) { v = x.v; return *this; }
	inline MI &operator++() { v < P - 1 ? v++ : v = 0; return *this; }
	inline MI operator++(int) { MI x = *this; v < P - 1 ? v++ : v = 0; return x; }
	inline MI &operator--() { v ? v-- : v = P - 1; return *this; }
	inline MI operator--(int) { MI x = *this; v ? v-- : v = P - 1; return x; }
	inline MI operator-()const { return MI(v ? P - v : 0, 0); }
	inline friend MI operator+(const MI &x, const MI &y) { return MI(add(x.v + y.v), 0); }
	inline friend MI operator-(const MI &x, const MI &y) { return MI(sub(x.v - y.v), 0); }
	inline friend MI operator*(const MI &x, const MI &y) { return MI((ll)x.v * y.v % P, 0); }
	inline friend MI operator/(const MI &x, const MI &y) { return x * y.inv(); }
	inline MI &operator+=(const MI &x) { v = add(v + x.v); return *this; }
	inline MI &operator-=(const MI &x) { v = sub(v - x.v); return *this; }
	inline MI &operator*=(const MI &x) { v = (ll)v * x.v % P; return *this; }
	inline MI &operator/=(const MI &x) { return *this *= x.inv(); }
	template < class T, enable_if_t < numeric_limits < T >::is_integer, int > = 0 >
	inline MI qpow(T y)const
	{ MI x(*this), z(1, 0); while ( y ) { if ( y & 1 ) z *= x; if ( y >>= 1 ) x *= x; } return z; }
	template < class T, enable_if_t < numeric_limits < T >::is_integer, int > = 0 >
	inline friend MI qpow(const MI &x, T y) { return x.qpow(y); }
	inline MI inv()const { assert(v); return qpow(P - 2); }
	inline friend MI inv(const MI &x) { return x.inv(); }
	inline friend istream &operator>>(istream &is, MI &x) { return is >> x.v; }
	inline friend ostream &operator<<(ostream &os, const MI &x) { return os << x.v; }
};
using MI = Modint < 1000000009 >;
int n, a[5009], o, nx; char l[5009], r[5009]; MI dp[5009][1024][2], ans;
inline MI slv()
{
	MI z = 0, x = 0;
	For(i, 0, n) For(j, 0, 1023) For(f, 0, 1) dp[i][j][f] = !i && !j && f;
	For(i, 1, n) For(j, 0, 1023) For(f, 0, 1) if ( dp[i - 1][j][f] ) For(k, 0, f ? a[i] : 9)
	{
		if ( k )
			o = j & ( ( 2 << k ) - 1 ), nx = ( j ^ ( o ? 1 << __lg(o) : 0 ) ) | ( 1 << k ),
			z += dp[i - 1][j][f] * __builtin_popcount(nx) * 10,
			dp[i][nx][f && ( k == a[i] )] += dp[i - 1][j][f];
		else dp[i][j][f && ( k == a[i] )] += dp[i - 1][j][f];
	}
	For(i, 2, n) x = x * 10 + a[i];
	return z - ( a[1] - 1 ) * a[1] / 2 * qpow(MI(10), n - 1) - a[1] * ( x + 1 );
}
int main()
{
	read(n), read_cstr(l + 1, r + 1);
	For(i, 1, n) a[i] = r[i] - '0';
	ans = slv();
	if ( any_of(l + 1, l + n + 1, [&](char x) { return x != '0'; }) )
	{
		For(i, 1, n) a[i] = l[i] - '0';
		Fol(i, n, 1) if ( a[i] ) { a[i]--; break; } else a[i] = 9;
		ans -= slv();
	}
	return println(ans.v), 0;
}
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