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()
{
string input;
int sum=0;
for(int i=1;i<=10000;i++)
{cin >> input;
if(input!="0")
{for(int i=0;i<=input.length()-1;i++)
{sum=sum+int(input[i])-48;}
cout << sum << endl;
sum=0;
}
}
}
