#include <bits/stdc++.h>
using namespace std;
using ll = long long;
ll siz[30];
int mss;
string key = "yuusaan";
char calc(int L, ll K) {
	if (L == 1) {
		return key[K - 1];
	}
	int ans = 0;
	while (1) {
		ll w = (ans % 6 ? 1ll : siz[L - 1]);
		K -= w;
		if (K <= 0) {
			K += w;
			break;
		}
		ans ++;
	}
	if (ans % 6) {
		return key[ans];
	} else {
		return calc(L - 1, K);
	}
}
int main () {
	ll N, K;
	cin >> N >> K;
	siz[0] = 1;
	mss = 1;
	while (siz[mss - 1] < K) {
		siz[mss] = siz[mss - 1] * 2 + 5;
		mss ++;
	}
	N = min(N, (ll)mss);
	cout << calc(N, K) << endl;
}