def learn(text)
	words = text.split(/[^a-zA-Z]/)
	freqs = Hash.new(0)
	words.each { |word| freqs[word] += 1 }
	freqs = freqs.sort_by {|x,y| y }
	freqs.reverse!
	freqs.each {|word, freq| puts word+' '+freq.to_s}
end


puts "Teach me something\n\n"
text = gets.chomp
learn text

#words = text.split(/[^a-zA-Z]/)
#freqs = Hash.new(0)
#words.each { |word| freqs[word] += 1 }
#freqs = freqs.sort_by {|x,y| y }
#freqs.reverse!
#freqs.each {|word, freq| puts word+' '+freq.to_s}