B3311331313231311331322331333131133132333132333133313223313231333132322122321   >>    B331133131323131133132233133313113313233313233313331322331323133313232212232   <<    B3311331313231311331322331333131133132333132333133313223313231333132322122323   >>      B3311331313231311331322331333131133132333132333133313223313231333132322122322   >>