C22212323232133313113313331333132313331323132321311333112211211   >>    C2221232323213331311331333133313231333132313232131133311221121   <<    C22212323232133313113313331333132313331323132321311333112211213   >>      C22212323232133313113313331333132313331323132321311333112211212   >>