import sys

# sys.setrecursionlimit(200005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 62)

# md = 10**9+7
md = 998244353

# f(lv)=y+f(lv-1)+f(lv-1)+s+f(lv-1)+f(lv-1)+n

size=[7]
while size[-1]<10**15:size.append(size[-1]*4+3)

n,k=LI()
k-=1
n=min(n-1,24)

while n:
    if k==0:
        print("y")
        exit()
    k-=1
    s=size[n-1]
    if k<2*s:
        k%=s
    elif k==2*s:
        print("s")
        exit()
    elif k==4*s+1:
        print("n")
        exit()
    else:
        k=(k-1)%s
    n-=1

print("yuusaan"[k])