B3311331313231311331322331333132313331322331323133313331322331333211331   >>    B331133131323131133132233133313231333132233132313331333132233133321133   <<    B3311331313231311331322331333132313331322331323133313331322331333211333   >>      B3311331313231311331322331333132313331322331323133313331322331333211332   >>