n = input().split()
a = int(n[0])
b = int(n[1])
c = int(n[2])
if 16 <= a <= 19 and 50 <= b <= 80 and 165 <= c <= 185:
    print('Y')
else:
    print('N')
/**************************************************************
	Problem: 1661
	User: admin
	Language: Python
	Result: Accepted
	Time:246 ms
	Memory:34480 kb
****************************************************************/