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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>
int main() {
  static char str[64];
  int l, i, res;
  scanf("%s", str);
  l = strlen(str);
  res = 0;
  for (i = 0; i < l; i++) {
    char c = str[i];
    if (isupper(c))
      res += c - 'A' + 1;
    else if (islower(c))
      res -= c - 'a' + 1;
  }
  printf("%d\n", res);
  return 0;
}
