CIBD 6.0: Construct a cyclic IBD of size (v,k,r)
(c) 2007 Design Computing (designcomputing.net/)

Note: Best cyclic IBD for v=8, k=4, r=6, b=12.

try #     	1
seed      	1200633335390
# of iterations	0
E         	0.8486
E/U       	0.9941
concurrences	2(4) 3(2) 4(1) 

Initial block(s) and the # of blocks generated by each initial block:

0	5	2	6	 (8)
0	3	4*	7*	 (4)

Plan (blocks are columns):

4	2	3	0	2	6	0	0	5	6	5	7	
5	6	5	4	6	7	5	6	1	7	1	4	
7	4	2	2	5	1	1	4	2	2	0	0	
1	1	7	7	0	3	3	3	6	3	4	3	

Note: CIBD used 0.016 seconds.