> xeasy
> Contour plot         [cp]
>  
> level and bas 1 -16529.333984
> level and bas 2 -11806.810547
> level and bas 3 -8433.579102
> level and bas 4 -6024.128418
> level and bas 5 -4303.091797
> level and bas 6 -3073.779785
> level and bas 7 -2195.699951
> level and bas 8 -1568.500000
> level and bas 9 -1120.500000
> level and bas 10 -800.500000
> level and bas 11 800.500000
> level and bas 12 1120.500000
> level and bas 13 1568.500000
> level and bas 14 2195.699951
> level and bas 15 3073.779785
> level and bas 16 4303.091797
> level and bas 17 6024.128418
> level and bas 18 8433.579102
> level and bas 19 11806.810547
> level and bas 20 16529.333984
>  
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> Plotting file        [pf]
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> Contour plot         [cp]
>  
> level and bas 1 -12397.125977
> level and bas 2 -8855.233398
> level and bas 3 -6325.309570
> level and bas 4 -4518.221191
> level and bas 5 -3227.443604
> level and bas 6 -2305.459961
> level and bas 7 -1646.899902
> level and bas 8 -1176.500000
> level and bas 9 -840.500000
> level and bas 10 -600.500000
> level and bas 11 600.500000
> level and bas 12 840.500000
> level and bas 13 1176.500000
> level and bas 14 1646.899902
> level and bas 15 2305.459961
> level and bas 16 3227.443604
> level and bas 17 4518.221191
> level and bas 18 6325.309570
> level and bas 19 8855.233398
> level and bas 20 12397.125977
>  
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> Plotting file        [pf]