The spelling of the word "DSMMC" can be explained through its phonetic transcription in IPA. It is pronounced as /diːɛsɛmɛmˈsiː/, where "D" is pronounced as "dee", "S" as "es", "M" as "em", and "C" as "see". The repetition of "S" and "M" in the word make it seem longer and arguably difficult to spell, but it is an acronym for something that could help in remembering the order of the letters. As with any new word, it may take some time to get used to the spelling until it becomes familiar.