import sys
input = sys.stdin.readline
sys.setrecursionlimit(2147483647)
INF=float("inf")
MOD=10**9+7
# A = [ int(input()) for _ in range(N) ]
##############################

A1, B1, A2, B2, A3, B3 = map(int, input().split())
a = str(A1**B1)[-1]
b = str(A2**B2)[-1]
c = str(A3**B3)[-1]

ans = int(a)+int(b)+int(c)

if ans %2 == 0:
    print(':-)')
else:
    print(':-(')