o angka+angka bisa ya
o angka angka bisa ya ?
o WORD_BOUNDARY a ŋ k a WORD_BOUNDARY a ŋ k a WORD_BOUNDARY b i s a WORD_BOUNDARY j a WORD_BOUNDARY
o WORD_BOUNDARY a n g k a WORD_BOUNDARY a n g k a WORD_BOUNDARY b i s a WORD_BOUNDARY y a WORD_BOUNDARY ? WORD_BOUNDARY