a1, b1, a2, b2, a3, b3 = map(int,input().split())
check = 0
if a1%2 == 1:
    check += 1
if a2%2 == 1:
    check += 1
if a3%2 == 1:
    check += 1

if check%2 == 0:
    print(":-)")
else:
    print(":-(")