#include<stdio.h>
#include<ctype.h>
#include<stdlib.h>
namespace IO {
	constexpr int bufsize = 230005;
	char buf[bufsize], *f1, *f2;
	char gtchar() {return f1 == f2 && (f2 = buf + fread(f1 = buf, 1, bufsize, stdin)) == buf? EOF: *f1++;}
	template<typename T> void read(T &ret)
	{
		int f = ret = 0;
		char ch = gtchar();
		while(!isdigit(ch)) f = ch == '-', ch = gtchar();
		while(isdigit(ch)) ret = (ret << 3) + (ret << 1) + (ch ^ 48), ch = gtchar();
		if(f) ret = -ret;
	}
	template<typename T, typename ...t> void read(T &a, t &...b) {read(a), read(b...);}
}using IO::read;
typedef long long ll;
typedef unsigned long long ull;
constexpr int mod = 1e9 + 7;
ll l, r;
int f(ll x)
{
	int ret = 0;
	while(x > 1) ret += (x & 1) + 1, x = x + 1 >> 1;
	return ret;
}
// template<typename t> t Add(t a, t b) {return (a += b) >= mod? a - mod: a;}
int Add(int a, const int &b) {return (a += b) >= mod? a - mod: a;}
int solve(ll x)
{
	if(x <= 1) return 0;
	int ret = (x & 1)? f(x--): 0;
	ret = Add(Add(Add(ret, solve(x >> 1) * 2 % mod), (x >> 1) % mod * 3ll % mod), mod - 2);
	// if(ret < 0) printf("%lld %lld %lld\n", x, x + (x >> 1) - 2, solve(x >> 1)), exit(-1);
	return ret;
}
int main()
{
	// freopen(".in", "r", stdin);
	// freopen(".out", "w", stdout);
	read(l, r);
	// printf("%lld\n", solve(l - 1));
	printf("%d\n", Add(solve(r), mod - solve(--l)));
	return 0;
}