第六题

x = int(input())
a = set()
for i in range(5):
    a.add(int(input()))
b = {12, 43, 56, 2}
c = {3, 2, 67}
if x in a:
    y = 1
elif x in b:
    y = 2
elif x in c:
    y = 3
else:
    y = 4
print('y =', y)