Table 1.

Coverage (upper panel), absolute ranks (mid panel) and relative ranks (lower panel) for the equivalence class of 8 circular codes presented in Table 4. The universality of the results is clear if we consider the ranks within classes: for instance the coverage of code $X_{173}$ for bacteria is $46.4\%$ (upper panel). It is not the highest coverage among the 216 codes, indeed it is the second (mid panel). However, it is always the highest within its class (lower panel). This universal behaviour holds for the whole set of 216 codes partitioned in 27 equivalence classes.

Coverage	$X_{173}$	$X_{176}$	$X_{203}$	$X_{206}$	$X_{183}$	$X_{182}$	$X_{193}$	$X_{192}$
Bacteria	46.4	43.9	36.0	33.6	26.8	22.8	22.1	18.1
Animals	42.0	38.8	35.9	32.8	28.6	26.2	25.8	23.4
Viral	43.2	40.3	35.9	33.0	28.4	26.1	24.7	22.4
Plants	39.7	36.7	34.8	31.7	29.3	27.5	25.3	23.5

Absolute rank	$X_{173}$	$X_{176}$	$X_{203}$	$X_{206}$	$X_{183}$	$X_{182}$	$X_{193}$	$X_{192}$
Bacteria	2	11	58	81	155	189	195	212
Animals	2	19	43	84	148	180	187	208
Viral	2	18	53	84	148	176	190	209
Plants	16	35	55	98	140	165	190	208

Relative rank	$X_{173}$	$X_{176}$	$X_{203}$	$X_{206}$	$X_{183}$	$X_{182}$	$X_{193}$	$X_{192}$
Bacteria	1	2	3	4	5	6	7	8
Animals	1	2	3	4	5	6	7	8
Viral	1	2	3	4	5	6	7	8
Plants	1	2	3	4	5	6	7	8