package main

import (
	"bufio"
	"fmt"
	"io"
	"log"
	"os"

	"strconv"
	"strings"
)

func Run(in io.Reader, out io.Writer) error {
	sc := bufio.NewScanner(in)
	for sc.Scan() {
		var sum int64 = 0

		line := sc.Text()
		for _, scoreText := range strings.Split(line, "") {
			score, err := strconv.ParseInt(scoreText, 0, 64)
			if err != nil {
				log.Fatal(err)
			}
			if score == 0 {
				sum += 10
			} else {
				sum += score
			}
		}
		fmt.Fprintf(out, "%d\n", sum)
		return nil
	}

	return nil
}

func main() {
	err := Run(os.Stdin, os.Stdout)

	if err != nil {
		log.Fatal(err)
	}
}