B3311331313231311331322331333132233131133132233133313231333132333132213231311   >>    B331133131323131133132233133313223313113313223313331323133313233313221323131   <<    B3311331313231311331322331333132233131133132233133313231333132333132213231313   >>      B3311331313231311331322331333132233131133132233133313231333132333132213231312   >>