A Ruby script that prints a matrix of valid two-letter Scrabble words.

gistfile1.rb

Letters = (?A..?Z).to_a
Words = %w[AA  AB  AD  AE  AG  AH  AI  AL  AM  AN  AR  AS  AT  AW  AX  AY  BA  BE  BI  BO 
           BY  DE  DO  ED  EF  EH  EL  EM  EN  ER  ES  ET  EX  FA  GO  HA  HE  HI  HM  HO
           ID  IF  IN  IS  IT  JO  KA  LA  LI  LO  MA  ME  MI  MM  MO  MU  MY  NA  NE  NO
           NU  OD  OE  OF  OH  OM  ON  OP  OR  OS  OW  OX  OY  PA  PE  PI  RE  SH  SI  SO
           TA  TI  TO  UH  UM  UN  UP  US  UT  WE  WO  XI  XU  YA  YE  YO] # http://phrontistery.info/scrabble3.html
Separator = "|"

puts "  " + Separator + Letters * (" " + Separator)
Letters.each do |first|
  print first + "  "
  Letters.each do |second|
    word = first + second
    if Words.include? word
      print word
    else
      print "  "
    end
    print Separator
  end
  puts
end