C11122123231323131323131323132322331323331313232313231323132313211   >>    C1112212323132313132313132313232233132333131323231323132313231321   <<    C11122123231323131323131323132322331323331313232313231323132313213   >>      C11122123231323131323131323132322331323331313232313231323132313212   >>