#include<bits/stdc++.h>
// #include<atcoder/all>
// #include<boost/multiprecision/cpp_int.hpp>

using namespace std;
// using namespace atcoder;
// using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<ll,ll>;
using vi = vector<ll>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using ve = vector<vector<int>>;
using vb = vector<bool>;
using vvb = vector<vb>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define sz(c) ((ll)(c).size())
#define LB(A,x) (int)(lower_bound(A.begin(),A.end(),x)-A.begin())
#define UB(A,x) (int)(upper_bound(A.begin(),A.end(),x)-A.begin())
// #define MOD 1000000007
#define MOD 998244353
template<typename T>using min_priority_queue=priority_queue<T,vector<T>,greater<T>>;
template<typename T>ostream&operator<<(ostream&os,vector<T>&v){for(int i = 0;i < v.size();i++)os<<v[i]<<(i+1!=v.size()?" ":"");return os;}
template<typename T>istream&operator>>(istream&is,vector<T>&v){for(T&in:v)is>>in;return is;}
template<typename T1,typename T2>ostream&operator<<(ostream&os,pair<T1,T2>&p){os<<p.first<<" "<<p.second;return os;}
template<typename T1,typename T2>istream&operator>>(istream&is,pair<T1,T2>&p){is>>p.first>>p.second;return is;}
template<typename T> inline bool chmax(T &a,T b){if(a < b){a = b;return true;}return false;}
template<typename T> inline bool chmin(T &a,T b){if(a > b){a = b;return true;}return false;}
ld dist(ld x1,ld y1,ld x2, ld y2){return sqrtl((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));}



int main(){
  
  ios_base::sync_with_stdio(0), cin.tie(0);
  ll n,K;cin >> n >> K;
  if(K <= n){
    cout << "y\n";
    return 0;
  }
  auto lv = [](ll n){return 2*(1ll << (2*n))-1;};
  string g = "uusaa";
  auto dfs = [&](auto &dfs,ll n,ll K)->char{
    if(n >= 30)return dfs(dfs,29,K-(n-29));
    if(n == 1)return ("y"+g+"n")[K-1];
    if(K == 1)return 'y';
    if(K <= lv(n-1)+1)return dfs(dfs,n-1,K-1);
    if(K <= 2*lv(n-1)+1)return dfs(dfs,n-1,K-1-lv(n-1));
    if(K == 2*lv(n-1)+2)return 's';
    if(K <= 3*lv(n-1)+2)return dfs(dfs,n-1,K-2-2*lv(n-1));
    if(K <= 4*lv(n-1)+2)return dfs(dfs,n-1,K-2-3*lv(n-1));
    return 'n';
  };
  cout << dfs(dfs,n,K) << "\n";
  

  return 0;
}