Pastable version of Circular Cipher

<pre class='prettyprint' language='ruby'>#Input string
msg = &quot;I wonder if this code can be better.&quot;

#Randomly-generated key
key = &quot;s7eOhg2fqgPRWXtp303B67551G5zpEyHe78q5NR5eWKP9eq9fk54D23&quot;

#This is the only way I can figure out how to store the result of the .each loops
ciphered = &quot;&quot;
deciphered = &quot;&quot;

beg = 32     #Equivalent to ASCII's {space} in decimal
fin = 91     #Equivalent to the distance between ASCII {space} and ASCII {z}

(0..msg.length-1).each do |i|
	foo = (msg[i] - beg) + (key[i] - beg)
	foo %= fin if foo &gt; fin
	foo += beg
	ciphered &lt;&lt; foo
end

(0..msg.length-1).each do |i|
	foo = (ciphered[i] - beg) - (key[i] - beg)
	foo += fin if foo &lt; 0
	foo += beg
	deciphered &lt;&lt; foo
end

#msg should now be the same as deciphered
puts msg
puts ciphered
puts deciphered</pre>
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Pastable version of Circular Cipher