ABCDEGHIJKMNOPSTUWY O Odo-ri Oegyoanboyeonguwon Ogeumdong-ucheguk Ogŭm-dong Oju-junghakkyo Okchŏng-junghakkyo Oksui-dong Oksuil-tong Oksuyeok Onsu-dong Onsu-godŭnghakkyo Onsustation Oryudongyeok Oryun-dong Osandang-byeongwon