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

### Prompt

Your task is to create a cpp solution to 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"){
        int sum=0;
        for(int i=0;i<s.size();i++)
            sum+=s[i]-'0';
        cout<<sum<<endl;
        cin >>s;
    }
}

```