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(){
	while(true) {
		string str;
		cin >> str;
		if(str[0] == '0') break;
		int ans = 0;
		int len = str.size();
		while(--len >= 0)
			ans += str[len] - '0';
		printf("%d\n", ans);
	}
}

