package main

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

func main() {
    var num, sum int
    sc := bufio.NewScanner(os.Stdin)
    for sc.Scan() {
        for _, str := range strings.Fields(sc.Text()) {
            num, _ = strconv.Atoi(str)
            sum += num
        }
        fmt.Println(sum)
        sum = 0
    }
}