koko wa muzukashiku nai
koko wa muzukashiku nai ?
k o k o WORD_BOUNDARY w a WORD_BOUNDARY m ɯ z ɯ k a ʃ i k ɯ WORD_BOUNDARY n a i WORD_BOUNDARY
k o k o WORD_BOUNDARY w a WORD_BOUNDARY m u z u k a s h i k u WORD_BOUNDARY n a i WORD_BOUNDARY