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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>
int get(char c) {
  if (c <= '9') return c - '0' + 1;
  if (c <= 'Z') return c - 'A' + 1;
  return c - 'a' + 1;
}
int main() {
  char str[55];
  bool a1, a2;
  scanf("%s", str);
  int ans = 0;
  for (int i = 0; str[i]; i++) {
    if (str[i] == '.') continue;
    a1 = ('@' < str[i]) & ('[' > str[i]);
    a2 = ('`' < str[i]) & ('{' > str[i]);
    int tmp = a1 * get(str[i]) - a2 * get(str[i]);
    ans += tmp;
  }
  printf("%d\n", ans);
  return 0;
}
