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(){ string str; 
int sum; 
while(cin >> str && str!="0")
{ sum = 0; for(int i=0,l=str.size();i<l;i++) sum += str[i]-'0'; cout << sum << endl; } } 
