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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() {
  string s;
  cin >> s;
  long long res = 0;
  for (auto c : s) {
    int ai = ((isdigit(c) || c == '.') ? 0 : tolower(c) - 'a' + 1);
    bool f1 = '@' < c;
    bool f2 = '[' > c;
    bool f3 = '`' < c;
    bool f4 = '{' > c;
    res = res + ((f1 & f2) * ai - (f3 & f4) * ai);
  }
  cout << res << endl;
  return 0;
}
