Function call expression by twobit

p=[]
P=p.pop
while 1:
 for c in raw_input():exec'p+=[%s]'%['c','c+P()+" "','P(-2)+P()+c'][ord(c)%3]
 print P()

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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return top