a for apple b for boy b for baby
a for apple b for boy b for baby
n:let prep n n:let prep n n:let prep n
a for apple b for boy b for baby .
 WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY
a WORD_BOUNDARY f o r WORD_BOUNDARY a p p l e WORD_BOUNDARY b WORD_BOUNDARY f o r WORD_BOUNDARY b o y WORD_BOUNDARY b WORD_BOUNDARY f o r WORD_BOUNDARY b a b y WORD_BOUNDARY . WORD_BOUNDARY