basa+basi basa+basi
basa basi basa basi .
b a s a WORD_BOUNDARY b a s i WORD_BOUNDARY b a s a WORD_BOUNDARY b a s i WORD_BOUNDARY
b a s a WORD_BOUNDARY b a s i WORD_BOUNDARY b a s a WORD_BOUNDARY b a s i WORD_BOUNDARY . WORD_BOUNDARY