C1212121231123232233131323223313233313231323222233131232313231323221   >>    C121212123112323223313132322331323331323132322223313123231323132322   <<    C1212121231123232233131323223313233313231323222233131232313231323223   >>      C1212121231123232233131323223313233313231323222233131232313231323222   >>