# Current data structure
$ADDRESS{Last1,First1}{Account} = ""; # Blank
$ADDRESS{Last1,First1}{First} = "First1";
$ADDRESS{Last1,First1}{Last} = "Last1";
$ADDRESS{Last1,First1}{Address} = "123 Home St";
$ADDRESS{Last1,First1}{Phone} = "(222) 333-4444";
$ADDRESS{Last1,First1}{Email} = "flast1@this.com";
$ADDRESS{Last1,First1}{Description} = "This\nThat\n";
$ADDRESS{Last2,First2}{First} = "First2";
...
$ADDRESS{Last999,First999}{Account} = ""; # Blank
$ADDRESS{Last999,First999}{First} = "First999";

# Desired data structure
$ADDRESS[0][0] = ""; # Blank
$ADDRESS[0][1] = "First1";
$ADDRESS[0][2] = "Last1";
$ADDRESS[0][3] = "123 Home St";
$ADDRESS[0][4] = "(222) 333-4444";
$ADDRESS[0][5] = "flast1@this.com";
$ADDRESS[0][6] = "This\nThat\n";
$ADDRESS[1][0] = ""; # Blank
$ADDRESS[1][1] = "First2";
...
$ADDRESS[998][0] = ""; # Blank
$ADDRESS[998][1] = "First999";
...