pista sulla pista
pista su pista
n prepart n
pista sulla pista .
p i s t ɐ WORD_BOUNDARY s o l l ɐ WORD_BOUNDARY p i s t ɐ WORD_BOUNDARY
p i s t a WORD_BOUNDARY s u l l a WORD_BOUNDARY p i s t a WORD_BOUNDARY . WORD_BOUNDARY