C22212323232133313113313331333133313113313112131221321123123111   >>    C2221232323213331311331333133313331311331311213122132112312311   <<    C22212323232133313113313331333133313113313112131221321123123113   >>      C22212323232133313113313331333133313113313112131221321123123112   >>