B3311331313231311331322331333132313233313231333131333133313232213221321   >>    B331133131323131133132233133313231323331323133313133313331323221322132   <<    B3311331313231311331322331333132313233313231333131333133313232213221323   >>      B3311331313231311331322331333132313233313231333131333133313232213221322   >>