abc ro aval bexun
abc ro aval bexun .
a̟ b kʰ WORD_BOUNDARY r o WORD_BOUNDARY a̟ v a̟ l WORD_BOUNDARY b e kʰ s u n̪ WORD_BOUNDARY
a b c WORD_BOUNDARY r o WORD_BOUNDARY a v a l WORD_BOUNDARY b e x u n WORD_BOUNDARY . WORD_BOUNDARY