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<stdio.h>
int main()
{
int i=0;
int sum=0;
char ch[1001]={0};

while(1)
{
	i=0;
scanf("%s",ch);
if(ch[0]-'0'==0)break;
sum=0;
while(1)
{
if(ch[i]=='\0')break;
sum+=(ch[i]-'0');
i++;
}
printf("%d\n",sum);
}
return 0;
}