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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 tot;
int len;
string a;
int main() {
  getline(cin, a);
  len = a.length();
  for (int i = 0; i < len; i++) {
    if ((a[i] >= 'A') && (a[i] <= 'Z')) tot += a[i] + 1 - 'A';
    if ((a[i] >= 'a') && (a[i] <= 'z')) tot -= a[i] + 1 - 'a';
  }
  printf("%d\n", tot);
  return 0;
}
