Write a program which reads an integer and prints sum of its digits.



Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Example

Input

123
55
1000
0


Output

6
10
1
#include<iostream>
#include<string>
using namespace std;
int main(){
  string S;
  int sum;
  while(cin >> S && S!="0"){
    sum = 0;
    for(int i=0;i<S.size();i++) sum += S[i]-'0';
    cout << sum << endl;
  }
}

