C22212323232133313113313331333132313331323132213231312131211212121   >>    C2221232323213331311331333133313231333132313221323131213121121212   <<    C22212323232133313113313331333132313331323132213231312131211212123   >>      C22212323232133313113313331333132313331323132213231312131211212122   >>