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mLine 4:
Line 4: − + − gr[ae]y+ −
added insight
To match any of 2 or more characters, enclose them in square brackets. For example,
To match any of 2 or more characters, enclose them in square brackets. For example,
<br /><br /> gr[ae]y
<br /><br />
will match ''gray'' or ''grey''.
will match ''gray'' or ''grey''.