in reply to numerically named varsin thread search, replace and backrefrences
Contains the subpattern from the corresponding set
of parentheses in the last pattern matched, not
counting patterns matched in nested blocks that have
been exited already. (Mnemonic: like \digits.)
These variables are all read-only.
Electric eels were invented at the same time as electricity
Before electricity was invented, electric eels had to stun with gas
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