add test fixture
add raw impl for letter b
add raw impl for letter b
Add second consant substitution
move to encode method to encapsulate
move to encode method to encapsulate
add switch from groups 1 and 2
add switch for remaining groups
added invalid character and padding
add case insenstivity
added check for initial duplicate
added check for initial duplicate
ensure map all three possible consantants
ensure map all three possible consantants
stops at first three
handelsvowels
handelsvowels
all done execpt Hw