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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>
char input[51];
int main() {
  scanf("%s", input);
  int res = 0;
  for (int i = 0; input[i]; ++i) {
    char ch = input[i];
    if (ch >= 'a' && ch <= 'z') res -= ch - 'a' + 1;
    if (ch >= 'A' && ch <= 'Z') res += ch - 'A' + 1;
  }
  printf("%d\n", res);
  return 0;
}
