B3311331313231311331322331333132233131133132233133313231333132313231231221   >>    B331133131323131133132233133313223313113313223313331323133313231323123122   <<    B3311331313231311331322331333132233131133132233133313231333132313231231223   >>      B3311331313231311331322331333132233131133132233133313231333132313231231222   >>