C1111233131211111211113313331333132313231323223313331312323221311   >>    C111123313121111121111331333133313231323132322331333131232322131   <<    C1111233131211111211113313331333132313231323223313331312323221313   >>      C1111233131211111211113313331333132313231323223313331312323221312   >>