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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;
char s[100];
int n, x, i;
int main() {
  scanf("%s", &s);
  n = strlen(s);
  for (i = 0; i < n; i++) {
    if ('A' <= s[i] && s[i] <= 'Z') {
      x += s[i] - 'A' + 1;
    } else if ('a' <= s[i] && s[i] <= 'z') {
      x -= s[i] - 'a' + 1;
    }
  }
  printf("%d\n", x);
}
