#c=int(input()) #print(c<75) #x = int (input()) #y = int (input()) #if x>y : # print(x,y) #if y>=x : # print(y,x) #height=float(input()) #weight=int(input()) #BMI=weight/ (height*height) #if BMI >= 26 : # interStand ="pianpang" #else : # interStand ="zhengchang||pianshou" #print(interStand) #c = int(input()) #if c >= 25 and c <= 30: #print("shihe") #else: # print("bushihe") l = int(input()) j = int(input()) if l >7 and j > 2: print("keyi") else: print("buneng")