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2013-02-01 10:27:10 +08:00
string | expands to
--------+--------------------------------
$NS | the length of S1 and S2
$S1 | array of integers S1
$S2 | array of integers S2
$NG | length of array G
$G | array of integers G
$NK | the number of keys, i.e. length of array K and H
$K | array with the quoted keys
$H | array of integer hash values
$$ | $ (a literal dollar sign)