""" Note
1 [km/h]=1000 [m/h]=1000/3600 [m/s]=5/18 [m/s] なので,
A [km] > B[m/s] <=> 5A > 18B
"""

A,B=map(int,input().split())
if 5*A>18*B:
    print("KoD")
elif 5*A<18*B:
    print("blackyuki")
else:
    print("same")