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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_base::sync_with_stdio(0), cin.tie(0);
  string s;
  cin >> s;
  int ans = 0;
  for (char c : s) {
    if (c >= 'a' && c <= 'z') ans -= c - 'a' + 1;
    if (c >= 'A' && c <= 'Z') ans += c - 'A' + 1;
  }
  cout << ans << endl;
}
