C22212323232133313113313331333132313331323132213231312121211223311   >>    C2221232323213331311331333133313231333132313221323131212121122331   <<    C22212323232133313113313331333132313331323132213231312121211223313   >>      C22212323232133313113313331333132313331323132213231312121211223312   >>