http://www.pythonchallenge.com/pc/def/oxygen.html

import re, Image  

i = Image.open("oxygen.png")   

row = [i.getpixel((x, 45)) for x in range(0, i.size[0], 7)]  

AS_list = [r for r, g, b, a in row if r == g == b]  

result = "".join(map(chr,AS_list))  

print "".join(map(chr,map(int,re.findall("\d+",result))))