B3311331313231311331322331333131133133313111333133313331322121111113313233221   >>    B331133131323131133132233133313113313331311133313331333132212111111331323322   <<    B3311331313231311331322331333131133133313111333133313331322121111113313233223   >>      B3311331313231311331322331333131133133313111333133313331322121111113313233222   >>