#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 


int main()
{

  CIN( string , S );
  const uint& size = S.size();
  ll answer = 0;
  
  for( ll i = 0 ; i < size ; i++ ){

    const string c = S.substr( i , 1 );

    for( ll j = 1 ; j < 10 ; j++ ){

      if( c == to_string( j ) ){

	answer += j;
	j = 10;

      }

    }
    
  }

  cout << answer << endl;
  return 0;

}