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 Kotlin (judge verdict: Accepted)

fun main(args: Array<String>){
	Sum_of_Numbers()
}
fun Sum_of_Numbers(){
	var i=0
	while(i<10000){
		var sum = 0
		val n = readLine()!!
		if(n=="0")break
		for(j in 0..n.length-1){
			sum += n.substring(j,j+1).toInt()
		}
		println(sum)
		i++
	}
}