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C. Without Text
time limit per test
2 seconds
memory limit per test
64 megabytes
input
standard input
output
standard output

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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