import sys, time, random
from collections import deque, Counter, defaultdict
def debug(*x):print('debug:',*x, file=sys.stderr)
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 61 - 1
mod = 998244353

n, k = mi()
k -= 1
def solve(n, k):
    if n == 1:
        return 'yuusaan'[k]
    else:
        return solve(n - 1, k // 7)
    
print(solve(n, k))