C111123313331323113313331323133313331311331311331333132233132213111   >>    C11112331333132311331333132313331333131133131133133313223313221311   <<    C111123313331323113313331323133313331311331311331333132233132213113   >>      C111123313331323113313331323133313331311331311331333132233132213112   >>