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 str;

while(1){

cin >> str;

if(str =="0"){
break;
}

int sum=0;

for(int i=0;i<(int)str.size();i++){
sum += str[i] - '0';

}

cout << sum << endl;

}

return 0;

}
