Preconditions and postconditions

To match or not to match

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Suppose you have the following string: yellowsocksyellow.
Which of the following patterns will match and return socks?

Select one or more options from the list

re.match('(?=yellow)socks', string)

re.search('socks(?<=yellow)', string)

re.search('socks(?=yellow)', string)

re.search('(?<=yellow)socks', string)

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