Problem:
Sum of Numbers

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.

Sample Input

123
55
1000
0

Sample Output

6
10
1

Solution in JavaScript (judge verdict: Accepted)

function main(input){
    let nums = input.split("\n");
    let i=0;
    while(nums[i]!=="0"){
        let sum=0;
        while(nums[i].length>0){
            let char = nums[i].slice(-1);
            nums[i] = nums[i].slice(0,-1);
            sum+= parseInt(char);
        }
        console.log(sum);
        i++;
    }
    
    
}


main(require("fs").readFileSync("/dev/stdin","utf-8"));