#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for(int i = a; i < b; i++)

#define min(a, b) ((a) < (b) ? (a) : (b))

#define max(a, b) ((a) > (b) ? (a) : (b))

#define index(a) (a - 'A')

#define transUpp(a) (a - 32)

#define transLow(a) (a + 32)

#define ll long long

#define PB push_back

int gcd(int a, int b){return b == 0 ? a : gcd(a%b, a);}

const int N = 20011;

int main()

{

    int s, x; double n, m;

    cin >> s >> x;

    s -= x;

    n = log(1 - double(s)/350.)/log(0.98);

    m = 350*(1 - pow(0.98, n + 1));

    if (m >= s + 2*x)

        cout << 'n' << endl;

    else

        cout << 'y' << endl;

    return 0;

}