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(){
char a[1001];
while(1){
scanf("%s", a);
if( a[0] == '0' ) break;
int sum = 0;
for (int i = 0; i < strlen(a); i++ ){
sum += (a[i]-'0');
}
printf("%d\n", sum);
}
return 0;
}