B3311331313231311331322331333131133133313111333133313331322221211
  >>
   B331133131323131133132233133313113313331311133313331333132222121
  <<
   B3311331313231311331322331333131133133313111333133313331322221213
  >>
 
 
 B3311331313231311331322331333131133133313111333133313331322221212
  >>