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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;
const int MAXN = 100005;
const int INF = 2147483647;
const long long LINF = 9223372036854775807;
const int dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1};
string s;
int ans;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> s;
  for (int(i) = 0; i < (s.size()); i++) {
    ans -= (s[i] >= 'a' && s[i] <= 'z') * (s[i] - 'a' + 1);
    ans += (s[i] >= 'A' && s[i] <= 'Z') * (s[i] - 'A' + 1);
  }
  cout << ans;
  return 0;
}
