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>
#include<string>
using namespace std;
int main() {
 string a; 
 while(cin >> a, a != "0") {
 int sum = 0;
 for(string::iterator it = a.begin(); a.end() != it; ++it) {
 sum+= (int)(*it-'0');
 }
 cout << sum << endl;
 }
 

}