Sproning or Spraining: How To spell?

The word Sproning is misspelled against Spraining, which is present continuous of "Sprain"

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

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