<image>

You can preview the image in better quality by the link: [http://assets.codeforces.com/files/656/without-text.png](//assets.codeforces.com/files/656/without-text.png)

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() {
  int sum = 0;
  char a[2333];
  scanf("%s", a);
  int len = strlen(a);
  for (int i = 0; i < len; i++) {
    if (a[i] >= 'A' && a[i] <= 'Z') sum += ((a[i] + 1) - 'A');
    if (a[i] >= 'a' && a[i] <= 'z') sum -= ((a[i] + 1) - 'a');
  }
  printf("%d", sum);
}
