import math
import sys


def input():
    return sys.stdin.readline().strip()


def main():

    def ln(n):
        if n == 1:
            return 7
        return 3 * ln(n - 1) + 4

    def get(n, k):
        if n == 1:
            return "yuusann"[k]
        if k < ln(n - 1):
            return get(n - 1, k)
        k -= ln(n - 1)
        if k < 4:
            return "uusa"[k]
        k -= 4
        if k < ln(n - 1):
            return get(n - 1, k)
        k -= ln(n - 1)
        return get(n - 1, k)

    n, k = map(int, input().split())

    print(get(min(n, 200), k - 1))


if __name__ == "__main__":
    main()