aa1 aa1 aa1 aa1
aa1 aa1 aa1 aa1
sfp sfp sfp sfp
aa1 aa1 aa1 aa1 .
a˥ WORD_BOUNDARY a˥ WORD_BOUNDARY a˥ WORD_BOUNDARY a˥ WORD_BOUNDARY
a a 1 WORD_BOUNDARY a a 1 WORD_BOUNDARY a a 1 WORD_BOUNDARY a a 1 WORD_BOUNDARY . WORD_BOUNDARY