C1212121231123232233131323223313231333132322113313231323331323131232311   >>    C121212123112323223313132322331323133313232211331323132333132313123231   <<    C1212121231123232233131323223313231333132322113313231323331323131232313   >>      C1212121231123232233131323223313231333132322113313231323331323131232312   >>