kill(all)$

van=facebook.com/LearningCalculus$

imin:   78$ imax:   80$
jmin: 1800$ jmax: 1900$
cmin:  -20$ cmax:   20$

for i: imin thru imax do
    for j: jmin thru jmax do
        for r: cmin thru cmax do
            for g: cmin thru cmax do
                for b: cmin thru cmax do
                (
                    if((i*r+(i+1)*g+(i+2)*b) = j) then
                    printf(true, "        ~3d ~3d ~3d ~3d ~3d ~%", i, j, r,g,b)
                );