If unsure about ie or ei, once the audio in the vowel is as Briefly /i:/, we spell it ie; but after the letter c, we spell it ei: … vacuum - Persons often misspell this word by using two c's and a person "u," or two of both equally https://dsl-spelling-mistake93714.topbloghub.com/34194429/spelling-mistake-dharmendra-sir-no-further-a-mystery