656_C. Without Text
<image>

You can preview the image in better quality by the link: [http://assets.codeforces.com/files/656/without-text.png](//assets.codeforces.com/files/656/without-text.png)

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
```python
s = input()

alpha = "abcdefghijklmnopqrstuvwxyz.0123456789"

res = 0
for c in s:
    x1 = int('@' < c and '[' > c)
    x2 = alpha.index(c.lower()) + 1
    x3 = int('`' < c and '{' > c)
    x4 = x1 * x2
    x5 = x2 * x3
    x6 = x4 - x5
    res += x6
    
print(res)
    

```