func main()
	var ss: [][]char :: cui@input().split(" ")
	var a1: int :: ss[0].toInt(&)
	var a2: int :: ss[2].toInt(&)
	var a3: int :: ss[4].toInt(&)
	var ans: bool :: (a1 + a2 + a3) % 2 = 0
	do cui@print("\{ans ?(":-)", ":-(")}\n")
end func