Sollen or Sollein: How To spell?

The word Sollen is misspelled against Sollein, an adjective meaning "Sullen; sad."

Word contains consecutive vowels 'EI' in between alphabets soll & n is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  soll-e-n 
Correct Spelling:  soll-ei-n 
Find more incorrect spellings of Sollein to spell right way.