C22212323232133313113313331333132313331323132213231312131223312312121   >>    C2221232323213331311331333133313231333132313221323131213122331231212   <<    C22212323232133313113313331333132313331323132213231312131223312312123   >>      C22212323232133313113313331333132313331323132213231312131223312312122   >>