package main

import (
    "bufio"
    "os"
    "strconv"
    "strings"
    "fmt"
    "math"
)

var sc = bufio.NewScanner(os.Stdin)

func gets() string {
    sc.Scan()
    return sc.Text()
}

func toInt(value string) int64 {
    num, _ := strconv.ParseInt(value, 10, 64)
    return num
}

func splitWithInt(value string) []int64 {
    vals := strings.Split(value, " ")
    nums := make([]int64, len(vals))
    for index, elem := range vals {
        nums[index] = toInt(elem)
    }
    return nums
}

func main() {
    var inputs []int64
    var ans string
    inputs = splitWithInt(gets())
    tapi := math.Pow(float64(inputs[0]), float64(inputs[1])) + math.Pow(float64(inputs[2]), float64(inputs[3])) + math.Pow(float64(inputs[4]), float64(inputs[5]))
    if math.Mod(tapi, 2.0) == 0 {
        ans = ":-)"
    } else {
        ans = ":-("
    }
    fmt.Println(ans)
}