function myout(text){console.log(text);}//standard output
function Main(input) {
	//input = parseInt(input);
	//input = input.trim().split(" ");
	//input = input.trim().split("\n");
	input = input.trim().split(" ").map((a)=>Number(a));
	//input = input.trim().split("\n").map((a)=>Number(a));
	if((input[0] + input[2] + input[4]) % 2 == 0){
	    myout(":-)");
	}else{
	    myout(":-(");
	}
}

Main(require("fs").readFileSync("/dev/stdin", "utf8").trim());