C111123313331323113313331333133313331122112312111133133313112211213121   >>    C11112331333132311331333133313331333112211231211113313331311221121312   <<    C111123313331323113313331333133313331122112312111133133313112211213123   >>      C111123313331323113313331333133313331122112312111133133313112211213122   >>