# Read the input values
A1, B1, A2, B2, A3, B3 = map(int, input().split())

# Check each A_i for parity and count the number of odd bases
count = 0
if A1 % 2 != 0:
    count += 1
if A2 % 2 != 0:
    count += 1
if A3 % 2 != 0:
    count += 1

# Determine if the count of odd bases is even
if count % 2 == 0:
    print(":-)")
else:
    print(":-(")