$2\mathrm{.}5\mathrm{.}2$: Switch statement to convert letters to Greek letters.

Write a switch statement that checks origLetter. If $\text{'}$a$\text{'}$ or $\text{'}$A$\text{'},$ print "Alpha". If $\text{'}$b$\text{'}$ or $\text{'}$B$\text{'},$ print "Beta". For any other character, print "Unknown". Use fall$-$through as appropriate. End with newline.