import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

def L(n):
    return 6 * 2 ** n - 5

def f(n, k):
    if n == 1:
        return "yuusaan"[k]
    
    if k < L(n - 1):
        return f(n - 1, k)
    elif k - L(n-1) < 5:
        return "uuusaaa"[k-L(n-1)]
    else:
        return f(n - 1, k - L(n-1) - 5)

n, k = na()
k -= 1
n = min(n, 60)
print(f(n, k))