per sbottonare il bottone
per sbottona il bottone
prep inf art n
per sbottonare il bottone .
p e r WORD_BOUNDARY z b o tː o n a r e WORD_BOUNDARY i l WORD_BOUNDARY b o tː o n e WORD_BOUNDARY
p e r WORD_BOUNDARY s b o t t o n a r e WORD_BOUNDARY i l WORD_BOUNDARY b o t t o n e WORD_BOUNDARY