a u a u o
a u a u o
n:let n:let n:let n:let n:let
a u a u o .
a WORD_BOUNDARY u WORD_BOUNDARY a WORD_BOUNDARY u WORD_BOUNDARY o̞ WORD_BOUNDARY
a WORD_BOUNDARY u WORD_BOUNDARY a WORD_BOUNDARY u WORD_BOUNDARY o WORD_BOUNDARY . WORD_BOUNDARY