nan da nan da nan da nan da
nan da nan da nan da nan da ?
n a n WORD_BOUNDARY d a WORD_BOUNDARY n a n WORD_BOUNDARY d a WORD_BOUNDARY n a n WORD_BOUNDARY d a WORD_BOUNDARY n a n WORD_BOUNDARY d a WORD_BOUNDARY
n a n WORD_BOUNDARY d a WORD_BOUNDARY n a n WORD_BOUNDARY d a WORD_BOUNDARY n a n WORD_BOUNDARY d a WORD_BOUNDARY n a n WORD_BOUNDARY d a WORD_BOUNDARY