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Input

The only line of the input is a string (between 1 and 50 characters long, inclusive). Each character will be an alphanumeric character or a full stop ".".

Output

Output the required answer.

Examples

Input

Codeforces


Output

-87


Input

APRIL.1st


Output

17
#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int CAPS = 0, caps = 0;
  string a;
  cin >> a;
  for (int i = 0; i < a.length(); i++) {
    if ((int)a[i] > (int)'@' && (int)a[i] < (int)'[') {
      CAPS += a[i] - (int)'@';
    }
    if ((int)a[i] > (int)'`' && (int)a[i] < (int)'{') {
      caps += a[i] - (int)'`';
    }
  }
  cout << CAPS - caps;
}
