a pa a Pisa boom abababa
a pa a pisa boom abababa .
ɐ WORD_BOUNDARY p ɐ WORD_BOUNDARY ɐ WORD_BOUNDARY p i z ɐ WORD_BOUNDARY b u m WORD_BOUNDARY ɐ b ɐ b ɐ b ɐ WORD_BOUNDARY
a WORD_BOUNDARY p a WORD_BOUNDARY a WORD_BOUNDARY p i s a WORD_BOUNDARY b o o m WORD_BOUNDARY a b a b a b a WORD_BOUNDARY . WORD_BOUNDARY