B3311331313231311331322331333132313233313231333131333133313233112323221211   >>    B331133131323131133132233133313231323331323133313133313331323311232322121   <<    B3311331313231311331322331333132313233313231333131333133313233112323221213   >>      B3311331313231311331322331333132313233313231333131333133313233112323221212   >>