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>

int main() {
  std::string x;
  while (std::cin >> x) {
    if (x == "0") return 0;
    int sum = 0;
    for (auto c : x) sum += c - 48;
    std::cout << sum << std::endl;
  }
}

