NWCHEM esp plt file format


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This is the part of NWCHEM esp plt file:

     3      3
39 35 38
-0.12893E+02 0.61073E+01-0.12288E+02 0.47120E+01-0.17464E+02 0.10362E+01
 0.410784248392E-01  0.418510519148E-01
0.426156923671E-01 0.433680036952E-01
0.441026428691E-01 0.448130600107E-01
0.454913613670E-01 0.461283009513E-01

what do the numbers in the first, second , third and the fourth line mean?