What were Nichkhun's first Korean words?

On the November 4th episode of Happy Together 3, Nichkhun revealed the first Korean words he learned while studying the language. He stated, "I learned the curse words first." Nichkhun's "curse mentor" Junsu stated, "When Nichkhun first arrived in Korea, he made initial eye contact with me. I'm sorry [for teaching him curses first]," spreading laughter around the filming. Nichkhun revealed his personal thoughts on studying swear words, saying, "I thought I had to learn curse words first. If someone curses me out and I'm unresponsive, they would think I'm stupid". When the staff asked him about his aegyo charms, Nichkhun replied, "I couldn't speak Korean, so I had to appeal with my body." Source: Daum