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#!/usr/bin/env ruby counts = {} counts.default = 0 while line = STDIN.gets toks = line.strip.split toks.each { |tok| counts[tok] += 1 } end sorted = [] counts.each_pair { |k,v| sorted << [k,v] } sorted.sort_by! { |i| -i[1] } sorted.each { |i| puts "#{i[0]}\t#{i[1]}" }