B3311331313231311331322331333131133132333132333133313223313231333132322222321   >>    B331133131323131133132233133313113313233313233313331322331323133313232222232   <<    B3311331313231311331322331333131133132333132333133313223313231333132322222323   >>      B3311331313231311331322331333131133132333132333133313223313231333132322222322   >>