The word Snufing is misspelled against Snuffing, which is present continuous of "Snuff"
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Snuffing has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Snu & ing which should not be misspelled with single 'F'
Wrong Spelling:  Snu-f-ing 
Correct Spelling:  Snu-ff-ing 
Check more misspelled words of Snuffing to spell it correct.