aa4 bak1 aa4 bak1 aa4 bak1 aa4 bak1
aa4
fil
aa4 bak1 aa4 bak1 aa4 bak1 aa4 bak1 .
a̞˧˩̰ WORD_BOUNDARY
a a 4 WORD_BOUNDARY b a k 1 WORD_BOUNDARY a a 4 WORD_BOUNDARY b a k 1 WORD_BOUNDARY a a 4 WORD_BOUNDARY b a k 1 WORD_BOUNDARY a a 4 WORD_BOUNDARY b a k 1 WORD_BOUNDARY . WORD_BOUNDARY