B3311331313231311331322331333132333132313112331333132333132322331322132211   >>    B331133131323131133132233133313233313231311233133313233313232233132213221   <<    B3311331313231311331322331333132333132313112331333132333132322331322132213   >>      B3311331313231311331322331333132333132313112331333132333132322331322132212   >>