[mono-vb] select case on java2s.com program

[Jude DaShiell]

That program works correctly under vbnc.  Furthermore specifying a single 
one letter string value for case statements also works.  So I think the 
problem is with Console.Read() and Console.ReadKey().  Interestingly I 
tried some conversion code on input values from those functions and had no 
luck with the conversions.  Next I'll have to see if the string$() 
function exists for those conversion attempts.  Could be that one solves 
my problem. If this was just a situation of menu selection in one place in 
the program it would be trivial to just use numbers.  However in another 
place I'm building two strings of values like "h" and "t" in very specific 
triplet sequences and then testing for them to select table subscripts. 
That's why I want to get this working correctly.