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 a;
	while(cin>>a,a!="0"){
	int b=0;
	for(int c=0;c<a.length();c++)b+=a[c]-48;
	cout<<b<<endl;
	}
}