B3311331313231311331322331333131133133313232112312113313231323221211
  >>
   B331133131323131133132233133313113313331323211231211331323132322121
  <<
   B3311331313231311331322331333131133133313232112312113313231323221213
  >>
 
 
 B3311331313231311331322331333131133133313232112312113313231323221212
  >>