The word Bireta is misspelled against Biretta, a noun meaning "Same as Berretta."
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Biretta has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings bire & a which should not be misspelled with single 'T'
Wrong Spelling:  bire-t-a 
Correct Spelling:  bire-tt-a 
Find more wrongly spelled words of Biretta to spell it well.