n,k = map(int,input().split())
n = min(n, 100)
l = [7]
for _ in range(105) :
	l.append(l[-1] * 4 + 3)
def f(n,k) :
	if n == 0 :
		return "ysnua"[(k*2+1)//3*3%5]
	for c in "yxxsxxn" :
	     if c == 'x' :
	     	if k < l[n-1] :
	     		return f(n-1,k)
	     	k -= l[n-1]
	     elif k == 0 :
	     	return c
	     else :
	     	k -= 1
print(f(n-1,k-1))