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(){

for(;;){
string num;
cin>>num;
if(num=="0"){break;}
int al=0;

for(int i=0;i<(int)num.size();i++){
al+=num[i]-'0';
}

cout<<al<<endl;
}

return 0;
}
