B3311331313231311331322331333132233131133132233133313231333132333222311   >>    B331133131323131133132233133313223313113313223313331323133313233322231   <<    B3311331313231311331322331333132233131133132233133313231333132333222313   >>      B3311331313231311331322331333132233131133132233133313231333132333222312   >>