system 1 and system 2 are non-isomorphic
BUCKET 2 START-------------------------------
system 2
{0,1,2}{3,4,5}{6,7,8,9,10}
{0,3,6}{1,4,8}{2,7,9,5,10}
{1,3,10,7}{2,5,8,6}{0,4,9}
{1,5,6,9}{2,3,7,4}{0,8,10}
{1,6,4,10}{2,8,3,9}{0,5,7}
-----------------------------------
BUCKET 2 END ---------------------------------
BUCKET 1 START-------------------------------
system 1
{0,1,2}{3,4,5}{6,7,8,9,10}
{0,3,6}{1,4,8}{2,7,9,5,10}
{0,5,1,7}{4,6,8,10}{2,3,9}
{0,8,3,10}{2,4,7,5}{1,6,9}
{1,3,7,10}{2,6,5,8}{0,4,9}
-----------------------------------
BUCKET 1 END ---------------------------------

d4.txt partitioned into 2 buckets