B3311331313231311331322331333131133132333132333133313223313231231231   >>    B331133131323131133132233133313113313233313233313331322331323123123   <<    B3311331313231311331322331333131133132333132333133313223313231231233   >>      B3311331313231311331322331333131133132333132333133313223313231231232   >>