Draw a circle marked AB, that is, the compatibility relationship; Draw two circles, cross them and mark AB, that is, the cross relationship.

Draw two circles, one big and one small, marked AB, which means the inclusion relationship; Draw two circles with the same size and no intersection, marked AB, which is an incompatible relationship; Draw two circles, one of which is separated by a line. The other is separated by two lines, marked AB, which is a contradictory relationship.