Straen or Strein: How To spell?

The word Straen is misspelled against Strein, a verb meaning "To strain."

Word contains consecutive vowels 'EI' in between alphabets str & n is misspelled as 'AE'
Wrong Spelling:  str-ae-n 
Correct Spelling:  str-ei-n 
Explore spell check of Strein to spell without errors.