C111123313331323113313331333133313331323132333112323133313123233313231311   >>    C11112331333132311331333133313331333132313233311232313331312323331323131   <<    C111123313331323113313331333133313331323132333112323133313123233313231313   >>      C111123313331323113313331333133313331323132333112323133313123233313231312   >>