def f(n):
    y = 'y_n'
    s = y
    for i in range(n-1):
        t = []
        for c in s:
            if c == 'y' or c == 'n':
                t.append(y)
            else:
                t.append(c)
        s = ''.join(t)

    return s


def solve(k):
    y = 'yuusaan'
    t = 'uusaa'  # 両端の y, n を除いた文字列

    yn = y + t
    _, m = divmod(k, len(yn))
    return yn[m]


N, K = map(int, input().split())
ans = solve(K-1)
print(ans)