Spelling Bee

If GH stands 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 Neighbour
If TTE stands for T as in Gazette
If EAU stands for O as in Plateau

The right way to spell POTATO shoud be: GHOUGHPHTHEIGHTTEEAU