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,
If TTE stands for T as in Gazette,
If EAU stands for O as in Plateau,

The right way to spell POTATO should be:

GHOUGHPHTHEIGHTTEEAU

#EnglishIsHard