Lets arrange the letters of OUGHT in alphabetical order. G,H,O,T,U Words starting with G−−−−→4! H−−−−→4! O−−−−→4! TG−−−→3! TH−−−→3! TO‌G−−→2! T O H ‌−−→2! ‌ T O U G H ‌→1! ─‌ Total ‌=89