tk A sama tk B aku eee
tk a sama tk b aku eee .
t e k a WORD_BOUNDARY  a WORD_BOUNDARY s a m a WORD_BOUNDARY t e k a WORD_BOUNDARY b e WORD_BOUNDARY a k u WORD_BOUNDARY  ə ɛ ə WORD_BOUNDARY
t k WORD_BOUNDARY a WORD_BOUNDARY s a m a WORD_BOUNDARY t k WORD_BOUNDARY b WORD_BOUNDARY a k u WORD_BOUNDARY e e e WORD_BOUNDARY