From: Hidden Markov Model Variants and their Application
V00, V11, V22: 17,839
VA0, VB2, VC1: 0
V01, V12, V20: 3
VA1, VB0, VC2: 0
V02, V10, V21: 58
VA2, VB1, VC0: 829
V0A, V1C, V2B: 741
VAA, VBB, VCC: 16,169
V0B, V1A, V2C: 957
VAB, VBC, VCA: 0
V0C, V1B, V2A: 5164
VAC, VBA, VCB: 54