C22212323232133313113313331333132313331323132213231312122221232211211   >>    C2221232323213331311331333133313231333132313221323131212222123221121   <<    C22212323232133313113313331333132313331323132213231312122221232211213   >>      C22212323232133313113313331333132313331323132213231312122221232211212   >>