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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 A[16];
int B[16];
int main() {
  string s;
  cin >> s;
  long long res = 0;
  for (auto i : s) {
    if (i == '.') {
      continue;
    }
    res += (('@' < i && '[' > i) - ('`' < i && '{' > i)) *
           ((i >= 'a' ? i : i ^ 32) - 'a' + 1);
  }
  cout << res;
}
