package main

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

func configure(scanner *bufio.Scanner) {
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
}
func getNextString(scanner *bufio.Scanner) string {
	scanned := scanner.Scan()
	if !scanned {
		panic("scan failed")
	}
	return scanner.Text()
}
func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}
func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}
func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	configure(scanner)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	s := getNextString(scanner)
	n := len(s)
	cc := make([]cww, 0)
	for c := 0; c < n; c++ {
		for w1 := c + 1; w1 < n; w1++ {
			for w2 := w1 + 1; w2 < n; w2++ {
				if s[w1] != s[w2] {
					continue
				}
				if s[c] == s[w1] {
					continue
				}
				if s[c] == '0' {
					continue
				}
				cc = append(cc, cww{used: (1 << uint(c)) | (1 << uint(w1)) | (1 << uint(w2)), score: 100*int(s[c]-'0') + 10*int(s[w1]-'0') + int(s[w2]-'0')})
			}
		}
	}
	q := make([]cww, 0)
	q = append(q, cww{used: 0, score: 0})
	m := map[uint32]int{}
	var ans int
	for len(q) > 0 {
		p := q[0]
		q = q[1:]
		if ans < p.score {
			ans = p.score
		}
		if m[p.used] > 0 {
			continue
		}
		m[p.used] = p.score
		for _, c := range cc {
			if p.used&c.used != 0 {
				continue
			}
			q = append(q, cww{used: p.used | c.used, score: p.score + c.score})
		}
	}
	fmt.Fprintln(writer, ans)
}

type cww struct {
	used  uint32
	score int
}