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