C22212323232133313113313331333132313331323133313331213132323123231311112321   >>    C2221232323213331311331333133313231333132313331333121313232312323131111232   <<    C22212323232133313113313331333132313331323133313331213132323123231311112323   >>      C22212323232133313113313331333132313331323133313331213132323123231311112322   >>