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;
string a;
int main(void){
    while(1){
    int v=0;
    cin>>a;
    if(a[0]=='0') break;
    for(int i=0;i<a.length();i++){
        v+=a[i]-'0';
    }
    cout<<v<<endl;
    }
}

