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<stdio.h>
#include<string.h>
using namespace std;
int main(){
	char x[1200];
	while(1){
		cin>>x;
		if(x[0]=='0')break;
		int sum=0;
		for(int i=0;i<strlen(x);i++){
			sum+=(int)(x[i]-48);
		}
		cout<<sum<<endl;
	}
}
	