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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 (int i = 0; i < s.size(); i++) {
    bool a = '@' < s[i];
    bool b = '[' > s[i];
    bool c = '`' < s[i];
    bool d = '{' > s[i];
    int e = (int)(a & b);
    int f = (int)(c & d);
    int index;
    if ('a' <= s[i] && s[i] <= 'z')
      index = s[i] - 'a';
    else if ('A' <= s[i] && s[i] <= 'Z')
      index = s[i] - 'A';
    else if ('0' <= s[i] && s[i] <= '9')
      index = s[i] - '0';
    else
      index = 0;
    int g = e * (index + 1);
    int h = f * (index + 1);
    res += g - h;
  }
  cout << res << endl;
}
