Given a String s, int a, and int b, Create a letter pattern by taking every ath character in s and repeating it b times unless it is a space, in which case you should ignore it. Examples:

lettterPattern("Aaron",1,1)

returns "Aaron", the same String because each character from the original string is repeated once.

lettterPattern("Aaron",1,2)

returns "AAaarroonn" because each character from the original string is repeated twice.

lettterPattern("Aaron",2,2)

returns "AArrnn" because every other character from the original string is repeated twice.