B3311331313231311331322331333132322132313223313231333132313231323132311231   >>    B331133131323131133132233133313232213231322331323133313231323132313231123   <<    B3311331313231311331322331333132322132313223313231333132313231323132311233   >>      B3311331313231311331322331333132322132313223313231333132313231323132311232   >>