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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;
long long D[200000], n, y, tmpX, tmpY, m, ans, x;
string s, t;
map<string, int> mp;
string tmp = "";
int main() {
  cin >> s;
  for (int i = 0; i < s.size(); i++)
    if (s[i] >= 'a' && s[i] <= 'z')
      ans -= (s[i] - 'a' + 1);
    else if (s[i] >= 'A' && s[i] <= 'Z')
      ans += (s[i] - 'A' + 1);
  cout << ans;
}
