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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 buf[55];
int main() {
  scanf("%s", buf);
  int n = strlen(buf);
  int res = 0;
  for (int i = 0; i <= n - 1; ++i) {
    if (buf[i] < '[' && buf[i] > '@') res += buf[i] - '@';
    if (buf[i] < '{' && buf[i] > '`') res -= buf[i] - '`';
  }
  cout << res << endl;
  return 0;
}
