Streotening or Straitening: How To spell?

The word Streotening is misspelled against Straitening, which is present continuous of "Straiten"

Word contains consecutive vowels 'AI' in between alphabets str & tening is misspelled as 'EO'
Wrong Spelling:  str-eo-tening 
Correct Spelling:  str-ai-tening 
Find more incorrect spellings of Straitening to spell right way.

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