C1212121231123232233131323223313233313233313223313232213231312323111   >>    C121212123112323223313132322331323331323331322331323221323131232311   <<    C1212121231123232233131323223313233313233313223313232213231312323113   >>      C1212121231123232233131323223313233313233313223313232213231312323112   >>