Stryn or Strein: How To spell?

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

Word contains consecutive vowels 'EI' in between alphabets str & n is misspelled as 'Y'
Wrong Spelling:  str-y-n 
Correct Spelling:  str-ei-n 
Navigate all incorrect spellings of Strein to spell it right.