#include <bits/stdc++.h>

using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;

__int128 ok(__int128 x, string s)
{
	FOR (i, 0, SZ(s))
	{
		if (s[i] == 'E')
			x *= 2;
		else
		{
			x--;
			if (x == 0 || x % 3 != 0)
				return -1;
			x /= 3;
			if (x % 2 == 0)
				return -1;
		}
		bitset<128> b(x);
		if (b.count() == 1)
			return -1;
	}
	return x;
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	string s;
	cin >> s;
	reverse(ALL(s));
	
	__int128 start = 1;
	LL ten = 1;
	FOR (i, 0, 18)
		ten *= 10;
	FOR (i, 0, 74)
	{
		auto res = ok(start, s);
		if (res != -1)
		{
			assert(res < ten);
			cout << LL(res) << '\n';
			return 0;
		}
		start <<= 1;
	}
	cout << "INVALID\n";
	
	return 0;
}