Retoling or Retailing: How To spell?

The word Retoling is misspelled against Retailing, which is present continuous of "Retail"

Word contains consecutive vowels 'AI' in between alphabets ret & ling is misspelled as 'O'
Wrong Spelling:  ret-o-ling 
Correct Spelling:  ret-ai-ling 
Find more incorrect spellings of Retailing to spell right way.

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