Returns a random string. Usage: $rs(number of random variables, variable 1, variable 2)

for example:

//echo -a $rs(333,A,Z)

would return PXYGGIXKMLQHRCDXIGXKWNGLINPHFHRXNOVXECTZBGBAJKMAXLAPADUDUDLNAUBIDYOWJKLOPUXCBOIEFRAHTQEJHYQGTAABEIPCXKUIQBSHBXULVONGKUMPYXGRRLGARNJDHPZDUMQGNZOTAZQRZSWDKBXRVFCBLCLCNIXAJFQMCDBETMKYPSHPKZXRWFYAZDCMSNQWRAOEJLSAYFRQRPGVNOWSHXISYLDKUDNGNUOPLNUAVORUILSOHSHHPQFDPGRICDNCMXXZRVFHDGFLGJSOUWWRWSYYBLXUAUBRGDYZIHPYOPPOTWDVAVGWXQLOJVWOHKIMJBWGS

alias rs {
  if ($0 == 3) {
    var %RCount 1 | var %RSet $1
    while (%RCount <= %RSet) {
      var %RString %RString $+ $rand($2,$3)
      inc %RCount 1
    }
    return %RString
  }
  else {
    echo 2 -a * /rs: Invalid parameters.  No request specified.
  }
}