B3311331313231311331322331333132233131133132233133313231333131131211211   >>    B331133131323131133132233133313223313113313223313331323133313113121121   <<    B3311331313231311331322331333132233131133132233133313231333131131211213   >>      B3311331313231311331322331333132233131133132233133313231333131131211212   >>