The word Clasmen is misspelled against Classmen, which is plural of "Classman"
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Classmen has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings cla & men which should not be misspelled with single 'S'
Wrong Spelling:  cla-s-men 
Correct Spelling:  cla-ss-men 
Explore spell check of Classmen to spell without errors.