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()
{
	while (1)
	{
		string a;
		cin >> a;
		if (a == "0"){ return 0; }
		int c = 0;
		for (int b = 0; b < a.size(); b++){ c += a[b] - '0'; }
		cout << c << endl;
	}
}