ya balik ketok+ketok
ya balik ketok ketok .
j a WORD_BOUNDARY b a l i k WORD_BOUNDARY k ə t o k WORD_BOUNDARY k ə t o k WORD_BOUNDARY
y a WORD_BOUNDARY b a l i k WORD_BOUNDARY k e t o k WORD_BOUNDARY k e t o k WORD_BOUNDARY . WORD_BOUNDARY