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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(int argc, char const *argv[]) {
  char s[56];
  gets(s);
  int n = strlen(s);
  int ans = 0;
  for (int i = 0; i < n; ++i) {
    char c = s[i];
    if (isupper(c))
      ans += c - 'A' + 1;
    else if (islower(c))
      ans -= c - 'a' + 1;
  }
  printf("%d\n", ans);
  return 0;
}
