The word Filies is misspelled against Fillies, which is plural of "Filly"
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Fillies has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings fi & ies which should not be misspelled with single 'L'
Wrong Spelling: fi-l-ies
Correct Spelling: fi-ll-ies
Find more wrongly spelled words of Fillies to spell it well.