C22212323232133313113313331333132313331323132213231312131312121   >>    C2221232323213331311331333133313231333132313221323131213131212   <<    C22212323232133313113313331333132313331323132213231312131312123   >>      C22212323232133313113313331333132313331323132213231312131312122   >>