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 <cstdio>

int main()
{
	char ch;
	int n = 0;

	while ((ch = getchar())!= '0' || n != 0)
	{
		if (ch == '\n')
		{
			printf("%d\n",n);
			n = 0;
		}
		else
		{
			ch &= 0x0F;
			n += ch;
		}
	}
	return 0;
}