The word Muming is misspelled against Mumming, which is present continuous of "Mumm"
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Mumming has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings mu & ing which should not be misspelled with single 'M'
Wrong Spelling: mu-m-ing
Correct Spelling: mu-mm-ing
Check more misspelled words of Mumming to spell it correct.