/* -*- coding: utf-8 -*-
 *
 * 2868.cc:  No.2868 Another String of yuusaan - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* constant */

const char s[] = "yuusaan";
const int MAX_N = 25;
const long long MAX_K = 1000000000000000LL;

/* typedef */

using ll = long long;

/* global variables */

ll fs[MAX_N + 1];

/* subroutines */

/* main */

int main() {
  fs[0] = 1;
  for (int i = 1; i <= MAX_N; i++) fs[i] = fs[i - 1] * 4 + 3;
  //for (int i = 0; i <= MAX_N; i++) printf(" fs[%d] = %lld\n", i, fs[i]);
  //printf("          %lld\n", MAX_K);
  //return 0;
  
  ll n, k;
  scanf("%lld%lld", &n, &k);

  n = min((ll)MAX_N, n);
  k--;

  for (int i = n; i > 1; i--) {
    ll f1 = fs[i - 1];
    if (k == 0) break;
    k--;
    if (k < f1) continue;
    k -= f1;
    if (k < f1) continue;
    k -= f1;
    if (k == 0) { k = 3; break; }
    k--;
    if (k < f1) continue;
    k -= f1;
    if (k < f1) continue;
    k -= f1;
    k = 6; break;
  }

  printf("%c\n", s[k]);
  
  return 0;
}