You have one chip and one chance to play roulette. Are you feeling lucky?
none
none
1
Red
2
Red
t = [1, 3, 5, 7, 9, 12, 14, 16, 18, 19, 21, 23, 25, 27, 30, 32, 34, 36]
if int(input()) in t:
    print('red')
else:
    print("black")

	 		 		   
	 					  	
 			      
  			   		