The word "Mirtie" is spelled with the letter "i" before the letter "e." In terms of phonetic transcription, the word can be broken down into "/ˈmɜrti/." The first syllable, "mir," is pronounced with the vowel sound "er" (/ɜr/) and the second syllable, "tie," is pronounced with the vowel sound "ie" (/i/). While the spelling of "Mirtie" may seem unusual due to the placement of the "i" before "e," it is a valid spelling according to English orthography.