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 c;
  while(c=getchar(),c!='0'){
    int t=c-'0';
    while(c=getchar(),c!='\n') t+=c-'0';
    cout<<t<<endl;
  }
}
