#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  cin >> s;
  while(s[0]!='0'){
    int i,p=0;
    for(i=0;i<s.size();i++){
      p+=s[i]-'0';
    }
    cout << p << endl;
    cin >> s;
  }
}

### Prompt

In cpp, your task is to solve the following problem:

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

### Response

```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  cin >> s;
  while(s[0]!='0'){
    int i,p=0;
    for(i=0;i<s.size();i++){
      p+=s[i]-'0';
    }
    cout << p << endl;
    cin >> s;
  }
}

```