F33132311331311331312323223313231133131323223313232333131333111   >>    F3313231133131133131232322331323113313132322331323233313133311   <<    F33132311331311331312323223313231133131323223313232333131333113   >>      F33132311331311331312323223313231133131323223313232333131333112   >>