C22212323232133313113313331333132313331323132213231312121232233121   >>    C2221232323213331311331333133313231333132313221323131212123223312   <<    C22212323232133313113313331333132313331323132213231312121232233123   >>      C22212323232133313113313331333132313331323132213231312121232233122   >>