C11122123231323131323131323132322331313232313231333132323323132313231231211   >>    C1112212323132313132313132313232233131323231323133313232332313231323123121   <<    C11122123231323131323131323132322331313232313231333132323323132313231231213   >>      C11122123231323131323131323132322331313232313231333132323323132313231231212   >>