C12313211232233312111111312111133133313331323133313332322331212221233132213131   >>    C1231321123223331211111131211113313331333132313331333232233121222123313221313   <<    C12313211232233312111111312111133133313331323133313332322331212221233132213133   >>      C12313211232233312111111312111133133313331323133313332322331212221233132213132   >>