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;
int sum=0;
while(1){
cin>>s;
if(s=="0"){
return 0;
}
for (int i = 0; i < s.length(); ++i) {
	sum+=s[i]-'0';
}
cout<<sum<<endl;
sum=0;
}
}