n = input().split()
a = float(n[0])
b = float(n[1])
if a >= 60 and b < 60 or a < 60 and b >= 60:
    print('green')
else:
    print('red')
/**************************************************************
	Problem: 1658
	User: admin
	Language: Python
	Result: Accepted
	Time:247 ms
	Memory:34244 kb
****************************************************************/