C22212323232133313113313331333132313331323132213231312121212233121   >>    C2221232323213331311331333133313231333132313221323131212121223312   <<    C22212323232133313113313331333132313331323132213231312121212233123   >>      C22212323232133313113313331333132313331323132213231312121212233122   >>