1. five cardinal relationships

a. 부자유친 (父子有親, bujayuchin)

b. 군신유의 (君臣有義, gunsinyuui)

c. 부부유별 (夫婦有別, bubuyubyeol)

d. 장유유서 (長幼有序, jang'yuyuseo)

e. 붕우유신 (朋友有信, bung'uyusin)

2. the Olympic Rings

3. the Olympic Games (by extension)