daily114.rb

dict = File.open('selected_four-letter_words.txt').map {|word| word.chomp}

#grab the two words so that you know what you're comparing with!

def one_letter(input,dict)
	output = []
	dict.each do |word|
		letterDiff = 0
		word.split('').to_enum.with_index {|letter,i| letterDiff = letterDiff+1 if letter == input[i]}
		output << word if letterDiff == 3
	end
	output
end

puts one_letter("best",dict).length

#bonus one
dict.each {|word| puts "#{word}" if one_letter(word,dict).length == 33}

#bonus two
oneStep = one_letter("best",dict)

twoStep = []
oneStep.each {|word| twoStep.concat(one_letter(word,dict))}

threeStep = []
twoStep.each {|word| threeStep.concat(one_letter(word,dict))}

bestSteps = oneStep.concat(twoStep).concat(threeStep).uniq

puts "#{bestSteps.length} different words can be reached from best in three steps or less (including itself)"