package main

import . "fmt"
import . "math/big"

func main() {
	var a1,b1,a2,b2,a3,b3 int64
	Scan(&a1,&b1,&a2,&b2,&a3,&b3)
	A1:=NewInt(a1)
	B1:=NewInt(b1)
	A2:=NewInt(a2)
	B2:=NewInt(b2)
	A3:=NewInt(a3)
	B3:=NewInt(b3)
	One:=NewInt(1)
	A1.Exp(A1,B1,One)
	A2.Exp(A2,B2,One)
	A3.Exp(A3,B3,One)
	A1.Add(A1,A2).Add(A1,A3)
	A1.Mod(A1,NewInt(2))
	if A1.Cmp(One)==0 {
		Println(":-(")
	} else {
		Println(":-)")
	}
	
}