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>
#include <iostream>
using namespace std;

int main() {
	string x;
	while(cin>>x && x!="0")
	{
		int sum = 0;
		for(int i=0; i<x.length(); i++)
		{
			sum += x[i] - '0' ;
		}
		cout<<sum<<'\n' ; 
	}
	
	return 0;
}
