<kmc> addquote <kmc> i had a dream just now where i was in a gymnasium and they had fire alarm pull stations but they also had a similarly shaped "call/cc alarm" which I think you were supposed to pull if you found a way to write call/cc (it was expected that people in this gymnasium would be doing a lot of programming in total dependently-typed languages)

#!/usr/bin/env python
print (lambda s: "".join([(s[i].upper() if i%2==0 else s[i].lower()) for i in range(len(s)) ]))(open("/dev/stdin").read())