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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 main(int argc, char const *argv[]) {
  int u = 0, l = 0;
  char s[51];
  for (int i = 0; i < 51; ++i) {
    s[i] = 0;
  }
  scanf("%s", &s);
  for (int i = 0; i < 51; ++i) {
    if (s[i] <= 90 && s[i] >= 65) {
      u += (s[i] - 64);
    } else if (s[i] <= 122 && s[i] >= 97) {
      l += (s[i] - 96);
    }
  }
  printf("%d", (u - l));
  return 0;
}
