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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() {
  string s;
  int res = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++)
    if (s[i] != '.')
      res += ((('@' < s[i]) && ('[' > s[i])) *
              ((s[i] >= 'a' && s[i] <= 'z')
                   ? s[i] - 'a' + 1
                   : ((s[i] >= 'A' && s[i] <= 'Z') ? s[i] - 'A' + 1
                                                   : s[i] - '0'))) -
             (((s[i] >= 'a' && s[i] <= 'z')
                   ? s[i] - 'a' + 1
                   : ((s[i] >= 'A' && s[i] <= 'Z') ? s[i] - 'A' + 1
                                                   : s[i] - '0')) *
              (('`' < s[i]) && ('{' > s[i])));
  cout << res << endl;
  return 0;
}
