Mark feet or foots
Mark foot or foot
n:prop n coord n
mark feet or foots ?
m ɑː ɹ k WORD_BOUNDARY f iː t WORD_BOUNDARY ɔː ɹ WORD_BOUNDARY f ʊ t s WORD_BOUNDARY
m a r k WORD_BOUNDARY f e e t WORD_BOUNDARY o r WORD_BOUNDARY f o o t s WORD_BOUNDARY