The word Muling is misspelled against Mulling, which is present continuous of "Mull"
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Mulling has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings mu & ing which should not be misspelled with single 'L'
Wrong Spelling: mu-l-ing
Correct Spelling: mu-ll-ing
Check more misspelled words of Mulling to spell it correct.