ah eh eh eh eh
ah eh eh eh eh
co co co co co
ah eh eh eh eh .
a WORD_BOUNDARY ɛ WORD_BOUNDARY ɛ WORD_BOUNDARY ɛ WORD_BOUNDARY ɛ WORD_BOUNDARY
a h WORD_BOUNDARY e h WORD_BOUNDARY e h WORD_BOUNDARY e h WORD_BOUNDARY e h WORD_BOUNDARY