param param pam pam eh
param param pam pam eh .
p a r a m WORD_BOUNDARY p a r a m WORD_BOUNDARY p a m WORD_BOUNDARY p a m WORD_BOUNDARY ɛ h WORD_BOUNDARY
p a r a m WORD_BOUNDARY p a r a m WORD_BOUNDARY p a m WORD_BOUNDARY p a m WORD_BOUNDARY e h WORD_BOUNDARY