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>
using namespace std;
int main(){
 string s;
    
    while(cin>>s){
        int i=0;
        int c=0;
        if(s[0]=='0')break;
        for(int i=0;i<s.size();i++)c+=s[i]-'0';
         cout <<c<<endl;
    }
}
