import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	A1, B1, A2, B2, A3, B3 = getlist()
	ans = 0
	if A1 % 2 == 1:
		ans += 1
	if A2 % 2 == 1:
		ans += 1
	if A3 % 2 == 1:
		ans += 1

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



if __name__ == '__main__':
	main()