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  1. or download this
    4363^7619082^309839685^309841122^14^18
    4363^7619082^309839685^309841122^14^19
    ...
    4363^7619082^309839685^309841122^14^52
    4363^7619082^309839685^309841122^14^51
    4363^7619082^309839685^309841122^23^21
    
  2. or download this
     perl -ne '@ar = split /\^/; $key="$ar[0],$ar[1],$ar[2],$ar[3]\n"; pri
    +nt $key if ( ! $seen{$key} ++ );' datafile
    
  3. or download this
    perl -naF^ -e '$key="$F[0],$F[1],$F[2],$F[3]\n"; print $key if ( ! $se
    +en{$key} ++ );' datafile
    
    ...
    -F/\^/
    -F"^"
    -F'^'