C313212111133131211331333133313331333133322331323133313221221
  >>
   C31321211113313121133133313331333133313332233132313331322122
  <<
   C313212111133131211331333133313331333133322331323133313221223
  >>
 
 
 C313212111133131211331333133313331333133322331323133313221222
  >>