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

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    vector<long>sz={1};
    long add=6;
    while(sz.size()<52)
    {
        long nxt=sz.back()+add;
        sz.push_back(nxt);
        add*=2;
    }
    auto dfs=[&](auto dfs, long n, long k)->char
    {
        if(n==1)return "yuusaan"[k];
        if(k<sz[n-1])return dfs(dfs,n-1,k);
        if(k<sz[n-1]+5)return "uusaa"[k-sz[n-1]];
        return dfs(dfs,n-1,k-sz[n-1]-5);
    };
    long N,K;
    cin>>N>>K;
    cout<<dfs(dfs,min(N,50L),K-1)<<endl;
}