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(){
  int sum;
  string s;
  while(1){
    cin>>s;
    if(s[0]=='0') break;
    sum=0;
    for(int i=0;i<s.size();i++) sum+=s[i]-'0';
    cout<<sum<<endl;
  }
  return 0;
}