Welcome to the Ranch
Please look
at this link about the code button; you didn't quite use it correctly, but I have set that right. Unfortunately I can see some style problems, including the names of your classes, and using tabs for indentation. It is also usually a mistake to make something
static without a good explanation.
Please explain
what you would like to do. What do you mean about moving a letter?
It might be easier if you use
char[]s rather than Strings because a
char[] is mutable and Strings are immutable.