Shufler or Shuffler: How To spell?
The word Shufler is misspelled against Shuffler, a noun meaning "Either one of the three common American scaup ducks. See Scaup duck, under Scaup."
Shuffler has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Shu & ler which should not be misspelled with single 'F'
Wrong Spelling:  Shu-f-ler  Correct Spelling:  Shu-ff-ler 
Check more misspelled words of Shuffler to spell it correct.