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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() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  string word;
  cin >> word;
  int res = 0;
  for (int i = 0; i < word.length(); i++) {
    if (word[i] > '@' && word[i] < '[')
      res += word[i] - '@';
    else if (word[i] > '`' && word[i] < '{')
      res -= word[i] - '`';
  }
  cout << res << '\n';
}
