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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 n;
int res;
char str[51];
int main() {
  scanf("%s", str);
  n = strlen(str);
  for (int i = 0; i < n; i++) {
    char s = str[i];
    bool a = s > 64 and s < 91;
    bool b = s > 96 and s < 123;
    int alpA = (s - 64) * a;
    int alpa = (s - 96) * b;
    res += alpA - alpa;
  }
  printf("%d\n", res);
  return 0;
}
