The word Underoficer is misspelled against Underofficer, a noun meaning "A subordinate officer."
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Underofficer has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Undero & icer which should not be misspelled with single 'F'
Wrong Spelling:  Undero-f-icer 
Correct Spelling:  Undero-ff-icer 
Find more incorrect spellings of Underofficer to spell right way.