tata tata tata tata
tata tata tata tata
chi chi chi chi
tata tata tata tata .
t a t a WORD_BOUNDARY t a t a WORD_BOUNDARY t a t a WORD_BOUNDARY t a t a WORD_BOUNDARY
t a t a WORD_BOUNDARY t a t a WORD_BOUNDARY t a t a WORD_BOUNDARY t a t a WORD_BOUNDARY . WORD_BOUNDARY