> xeasy
> Contour plot         [cp]
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> level and bas 1 -12397.126953
> level and bas 2 -8855.233398
> level and bas 3 -6325.309570
> level and bas 4 -4518.221191
> level and bas 5 -3227.443848
> level and bas 6 -2305.459961
> level and bas 7 -1646.900024
> 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 1646.900024
> level and bas 15 2305.459961
> level and bas 16 3227.443848
> level and bas 17 4518.221191
> level and bas 18 6325.309570
> level and bas 19 8855.233398
> level and bas 20 12397.126953
>  
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