#include <bits/stdc++.h>
using namespace std;

int main() {
  string s;
  while (cin >> s) {
    if (s == "0")
      break;
    int t = 0;
    for (int i = 0; i < s.length(); i++)
      t += s[i] - '0';
    cout << t << endl;
  }
  return 0;
}

### Prompt

Your task is to create a CPP solution to the following problem:

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

### Response

```cpp
#include <bits/stdc++.h>
using namespace std;

int main() {
  string s;
  while (cin >> s) {
    if (s == "0")
      break;
    int t = 0;
    for (int i = 0; i < s.length(); i++)
      t += s[i] - '0';
    cout << t << endl;
  }
  return 0;
}

```