nanka yoku wakannakatta kara
nanka yoku wakannakatta kara .
n a n k a WORD_BOUNDARY j o k ɯ WORD_BOUNDARY w a k a n n a k a t t a WORD_BOUNDARY k a r a WORD_BOUNDARY
n a n k a WORD_BOUNDARY y o k u WORD_BOUNDARY w a k a n n a k a t t a WORD_BOUNDARY k a r a WORD_BOUNDARY