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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;
  getline(cin, s);
  long long ans = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] >= 65 && s[i] <= 90) {
      ans += s[i] - 64;
    } else if (s[i] >= 97 && s[i] <= 122) {
      ans -= s[i] - 96;
    }
  }
  cout << ans << endl;
}
