k-pop knokk knoop ko-ko kokko kokou konno konnu koonu kouno kukko kukok kukup kunku kupon n-p-n nnooo no-no no-op nokko nokon non-u nonno nonop noonu nopun nu-nu nunon nunun okuku onoon onpop ooooo opoku oppon oukup p-n-p po-on po-po pokou ponnu ponup poopo popon popop poppo popup punon punuk puppo u-pop unnun uppon uuuuu