n,k = map(int,input().split())
a = [14]; n -= 1
for i in range(20):
    a.append(a[-1]*4+3)
    if a[-1]>k: break
m = len(a)-1
if n>m: k -= n-m; n = m
for i in range(m,0,-1):
    if k==1: exit(print("y"))
    if k==2+a[i-1]: exit(print("s"))
    if k==3+a[i-1]*2: exit(print("n"))
    k = k%(a[i-1]+1)-1
print("yuusannyuusann"[k-1])