Raoled or Railed: How To spell?

The word Raoled is misspelled against Railed, which is past tense of "Rail"

Word contains consecutive vowels 'AI' in between alphabets r & led is misspelled as 'AO'
Wrong Spelling:  r-ao-led 
Correct Spelling:  r-ai-led 
Find more incorrect spellings of Railed to spell right way.

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