The word Whifling is misspelled against Whiffling, which is present continuous of "Whiffle"
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Whiffling has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Whi & ling which should not be misspelled with single 'F'
Wrong Spelling:  Whi-f-ling 
Correct Spelling:  Whi-ff-ling 
Find more wrongly spelled words of Whiffling to spell it well.