C1212121231123232233131323223313231333132322133313233313123231111   >>    C121212123112323223313132322331323133313232213331323331312323111   <<    C1212121231123232233131323223313231333132322133313233313123231113   >>      C1212121231123232233131323223313231333132322133313233313123231112   >>