B3311331313231311331322331333132233131133132233133313231323131121311   >>    B331133131323131133132233133313223313113313223313331323132313112131   <<    B3311331313231311331322331333132233131133132233133313231323131121313   >>      B3311331313231311331322331333132233131133132233133313231323131121312   >>