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 ch;
int a;
while(1)
{a=0;
cin>>ch;
if(ch=="0") break;
int ren=ch.size();
for(int i=0;i<ren;i++)
	{
	a+=ch[i]-'0';
	}
cout<<a<<endl;
}
return 0;
}
