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;
	while(cin>>s, s!="0"){
		long long sum=0;
		for(int i=0; i<s.size(); i++)
			sum += (long long)(s[i]-'0');
		cout << sum << endl;
	}
}
