package main

import (
	"bufio"
	"fmt"
	"os"
)

func getSum(num []byte) int64 {
	number := int64(0)
	result := int64(0)

	for _, v := range num {
		if v >= '0' && v <= '9' {
			number = 10*number + int64(v-'0')
		} else if v == ' ' {
			result += number
			number = 0
		}
	}
	result += number
	return result
}

func main() {

	buf := bufio.NewReader(os.Stdin)
	input, err := buf.ReadBytes('\n')

	if err != nil {
		fmt.Println(err)
	}

	fmt.Printf("result : %d\n", getSum(input))
}