aa1 aa1 aa1 aa1
aa1 aa1 aa1 aa1
fil fil fil fil
aa1 aa1 aa1 aa1 .
a̞˥ WORD_BOUNDARY a̞˥ WORD_BOUNDARY a̞˥ WORD_BOUNDARY a̞˥ WORD_BOUNDARY
a a 1 WORD_BOUNDARY a a 1 WORD_BOUNDARY a a 1 WORD_BOUNDARY a a 1 WORD_BOUNDARY . WORD_BOUNDARY