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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 main() {
  char s[100];
  cin >> s;
  int i, sum = 0;
  for (i = 0; s[i] != '\0'; i++) {
    if (s[i] >= 'A' && s[i] <= 'Z')
      sum += int(s[i]) - int('A') + 1;
    else if (s[i] >= 'a' && s[i] <= 'z')
      sum -= (int(s[i]) - (int('a')) + 1);
  }
  cout << sum;
  return 0;
}
