B3311331313231311331322331333132313233313231333131333133313232212111113232131   >>    B331133131323131133132233133313231323331323133313133313331323221211111323213   <<    B3311331313231311331322331333132313233313231333131333133313232212111113232133   >>      B3311331313231311331322331333132313233313231333131333133313232212111113232132   >>