#include <bits/stdc++.h>
using namespace std;

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}

vector<long long> dp(50);
string org = "yuusaan";
char solve(long long n, long long k) {
	if (n == 1) {
		return org[k];
	}
	if (k < dp[n - 1]) {
		return solve(n - 1, k);
	} else if (k < dp[n - 1] + 5) {
		return org[k - dp[n - 1] + 1];
	} else {
		return solve(n - 1, k - dp[n - 1] - 5);
	}
}
int main() {
	fast_io();
	dp[1] = 7;
	for (int i = 2; i < 50; i++) {
		dp[i] = dp[i - 1] * 2 + 5;
	}
	long long n, k;
	cin >> n >> k;
	k--;
	if (n > 49) {
		n = 49;
	}
	cout << solve(n, k) << endl;
}