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0,"104"1,"Assign Tracking Numb"29,"905745371116"526,"0201"99,""

%rec = ( 
    0 => 104,
...
    526 => 0201,
    99 => ,
    );

$result = "0,\"104\"1,\"Assign Tracking Numb\"29,\"905745371116\"526,\
+"0201\"99,\"\"";
%row = $result =~ /((\d*),"\w*")/gm;
...
29,"905745371116"
526,"0201"
99,""