from decimal import Decimal
import sys
import bisect   # 二分
#import numpy as np  # 色々
import queue
import math
from itertools import product   # bit全
from collections import deque   # deque
MOD = int(1e9+7)
INF = 1<<60
PI = math.pi

#d=deque()  deque Objects
#q=queue.Queue()    queue Objects
#q=queue.LifoQueue()    stack Objects
#q=queue.PriorityQueue()    Priority Objects

A,B=map(int,input().split())

A*=1000
B=B*60*60

if A==B:
    print("same")
elif A>B:
    print("KoD")
else:
    print("blackyuki")