This graph demonstrates how yao-numbers (complement 360) and xiantian (complement 65) and Wen pairing correlate. Wen pairs are consecutively-numbered (odd-even) pairs; e.g., (33,34)
Five groups, lettered A, C, F, T, and L, have subgroups 1 and 2, according to their yao-number. Group T has no known subgroups.
Given any group A, C, F, L, or T:
boxed pairs are binary complements (65)
boxed pairs constitute a circle (or two triangles) 360 degrees. An hexagram is 180 degrees or pi, on average.