import math
import sys


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


def main():

    def get(n, k):
        if n == 1:
            if k < 7:
                return (True, "yuusann"[k])
            return (False, 7)

        z = get(n - 1, k)
        if z[0]:
            return z
        k -= z[1]
        ln = z[1]
        if k < 4:
            return (True, "uusa"[k])
        k -= 4
        z = get(n - 1, k)
        if z[0]:
            return z
        k -= z[1]
        z = get(n - 1, k)
        if z[0]:
            return z
        k -= z[1]
        return (False, 3 * ln + 4)

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

    print(get(n, k - 1)[1])


if __name__ == "__main__":
    main()