If GH can stand for P, as in "Hiccough;"
If OUGH stands for O, as in "Dough;"
If PHTH stands for T, as in "Phthisis;"
If EIGH stands for A, as in "Neighbor;"
F TTE stands for T, as in "Gazette;"
If EAU stands for O, as in "Plateau;"
Then, the right way to spell POTATO should be: GHOUGHPHTHEIGHTTEEAU