Uling or Ailing: How To spell?

The word Uling is misspelled against Ailing, which is present continuous of "Ail"

Word begins with consecutive vowels 'AI' followed by alphabets 'ling' is misspelled as 'U'
Wrong Spelling:  u-ling 
Correct Spelling:  ai-ling 
Find more wrongly spelled words of Ailing to spell it well.

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