Bilmen or Billmen: How To spell?
The word Bilmen is misspelled against Billmen, which is plural of "Billman"
Billmen has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings bi & men which should not be misspelled with single 'L'
Wrong Spelling:  bi-l-men  Correct Spelling:  bi-ll-men 
Find more wrongly spelled words of Billmen to spell it well.