Obtianed or Obtained: How To spell?

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

Word contains consecutive vowels 'AI' in between alphabets obt & ned is misspelled as 'IA'
Wrong Spelling:  obt-ia-ned 
Correct Spelling:  obt-ai-ned 
Find more wrongly spelled words of Obtained to spell it well.

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