Description
An alphabet diamond is a diamond that made of alphabet.
For example, given the center of the alphabet diamond, which is D,
then we can present the alphabet diamond as follow:
Note that the outmost contour will be A, and there is no space between each letter.
Input
There is only one line contains an character, which is the center of the alphabet diamomd.
The center is guaranteed to be a captial letter (A~Z).
Output
The alphabet diamond.
Detail will show at sample output.
Remember to put "\n" at the end of each line.