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Link: http://codepad.org/Ze3nP9Dw    [ raw code | output | fork ]

Python, pasted on Nov 7:
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import re

s = "RL2R'F2LD'"

for m in re.finditer("[FBUDLRfbudlrxyz][2']?", s):
    print m.group(0)


Output:
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R
L2
R'
F2
L
D'


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