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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[51];
  int ans = 0;
  scanf("%s", s);
  for (int i = 0; i < strlen(s); i++) {
    if (s[i] == '.')
      continue;
    else if ('A' <= s[i] && s[i] <= 'Z')
      ans = ans + (s[i] - 'A') + 1;
    else if ('a' <= s[i] && s[i] <= 'z')
      ans = ans - (s[i] - 'a') - 1;
    else if ('0' <= s[i] && s[i] <= '9')
      continue;
  }
  printf("%d", ans);
  return 0;
}
