B3311331313231311331322331333131133133313231133133313331322221211   >>    B331133131323131133132233133313113313331323113313331333132222121   <<    B3311331313231311331322331333131133133313231133133313331322221213   >>      B3311331313231311331322331333131133133313231133133313331322221212   >>