don't buy contact lenses
do buy contact lens
mod v n n
don't buy contact lenses .
d oʊ n t WORD_BOUNDARY b aɪ WORD_BOUNDARY k ɑː n t æ k t WORD_BOUNDARY l ɛ n z ɪ z WORD_BOUNDARY
d o n ' t WORD_BOUNDARY b u y WORD_BOUNDARY c o n t a c t WORD_BOUNDARY l e n s e s WORD_BOUNDARY