astoa astoa astoa
astoa astoa astoa .
a s̺ t̪ o a WORD_BOUNDARY a s̺ t̪ o a WORD_BOUNDARY a s̺ t̪ o a WORD_BOUNDARY
a s t o a WORD_BOUNDARY a s t o a WORD_BOUNDARY a s t o a WORD_BOUNDARY . WORD_BOUNDARY