C22212323232133313113313331333132313231333132313222132211312311   >>    C2221232323213331311331333133313231323133313231322213221131231   <<    C22212323232133313113313331333132313231333132313222132211312313   >>      C22212323232133313113313331333132313231333132313222132211312312   >>