package main

import "fmt"

func main() {
	var A1, B1, A2, B2, A3, B3 int
	fmt.Scan(&A1, &B1, &A2, &B2, &A3, &B3)
	if (A1%2 == 0 && A2%2 == 0 && A3%2 == 0) ||
		(A1%2 == 0 && A2%2 != 0 && A3%2 != 0) ||
		(A1%2 != 0 && A2%2 == 0 && A3%2 != 0) ||
		(A1%2 != 0 && A2%2 != 0 && A3%2 == 0) {
		fmt.Println(":-)")
	} else {
		fmt.Println(":-(")
	}
}