gistfile1.rb

# Decrypt
text = "Uid nx, aex jcdjipx iu wzux zp, ta wxtpa jtdaws, ai etkx vis.\n" +
     "Dcos zyexdzaxr aex Jxdw jezwipijes iu etkzyg nidx aety iyx hts\n" + 
	   "ai ri aex ptnx aezyg. Z zyexdzaxr aeta jezwipijes udin Wtdds Htww,\n" +
	   "hei zp ns exdi tqactwws. Z htya ai ntfx Dcos cpxdp udxx. Z htya ai\n" +
	   "gzkx aexn aex udxxrin ai qeiipx. Jxijwx tdx rzuuxdxya. Jxijwx qeiipx\n" +
	   "rzuuxdxya qdzaxdzt. Oca zu aexdx zp t oxaaxd hts tniyg ntys\n" +
	   "twaxdytazkxp, Z htya ai xyqicdtgx aeta hts os ntfzyg za qinuidatowx.\n" +
	   "Pi aeta'p heta Z'kx adzxr ai ri.\n" +
	   "Z htya ai piwkx jdiowxnp Z nxxa zy aex rtzws wzux os cpzyg qinjcaxdp,\n" +
	   "pi Z yxxr ai hdzax jdigdtnp. Os cpzyg Dcos, Z htya ai qiyqxyadtax aex\n" +
	   "aezygp Z ri, yia aex ntgzqtw dcwxp iu aex wtygctgx, wzfx patdazyg hzae\n" +
	   "jcowzq kizr  pinxaezyg pinxaezyg pinxaezyg ai pts, \"jdzya exwwi hidwr.\"\n" +
	   "Z vcpa htya ai pts, \"jdzya aezp!\" Z riy'a htya tww aex pcddicyrzyg\n" +
	   "ntgzq fxshidrp. Z vcpa htya ai qiyqxyadtax iy aex atpf. Aeta'p aex otpzq\n" +
	   "zrxt. Pi Z etkx adzxr ai ntfx Dcos qirx qiyqzpx tyr pcqqzyqa.\n" +
	   "Scfzezdi Ntapcniai. (hhh.tdaznt.qin/zyak/dcos)"


freqLang = "TEOIARNSHLMYUCWDGPFBVKJ"

len = text.length
frequency = Hash.new

for k in 0..(len - 1)
	c = text[k, 1].upcase
	if c =~ /[A-Z]/
		if frequency.has_key?(c) then frequency[c] = frequency[c] + 1
		else frequency[c] = 1 end
	end
end

dic = Hash.new
freqText = ""
index = 0

frequency.sort{ |a,b| b[1]<=>a[1] }.collect{ |a| 
	#puts(a[0] + " - " + a[1].to_s)
	freqText += a[0]
	dic[a[0].upcase] = freqLang[index, 1]
	index += 1
}

puts(freqLang)
puts(freqText)

decrypted = "";
len = text.length;

for k in 0..(len - 1)
	uper = false
	c = text[k, 1]
	
	if c =~ /[A-Z]/ then uper = true
	else c = c.upcase end

	if dic.has_key?(c)
		if uper	then decrypted += dic[c]
		else decrypted += dic[c].downcase end
	else decrypted += c end
end

puts(decrypted)