:( encrypts "a" as "a" using "a" as keyword
\ expected output, but not "a"
:( encrypts "world, say hello!" as "xoqmd, rby gflkp!" using "baz" as keyword
\ expected output, but not "xoqmd, rby gflkp!"
:( encrypts "BaRFoo" as "CaQGon" using "BaZ" as keyword
\ expected output, but not "CaQGon"
:( encrypts "BARFOO" as "CAQGON" using "BAZ" as keyword
\ expected output, but not "CAQGON"