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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 t = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++)
    if (s[i] <= 'z' && s[i] >= 'a')
      t -= s[i] - 96;
    else if (s[i] <= 'Z' && s[i] >= 'A')
      t += s[i] - 64;
  cout << t;
}
