Obtoned or Obtained: How To spell?

The word Obtoned is misspelled against Obtained, which is past tense of "Obtain"

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

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