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necessary unnecessary
Answer: unnecessary
legal illegal
Answer: illegal
organized disorganized
Answer: disorganized
impressed unimpressed
Answer: unimpressed
logical illogical
Answer: illogical
regular irregular
Answer: irregular
enthusiastic unenthusiastic
Answer: unenthusiastic
honest dishonest
Answer: dishonest
mature immature
Answer: immature
patient impatient
Answer: impatient
just unjust
Answer: unjust
grateful ungrateful
Answer: ungrateful
loyal disloyal
Answer: disloyal
legible illegible
Answer: illegible
edible inedible
Answer: inedible
literate illiterate
Answer: illiterate
replaceable irreplaceable
Answer: irreplaceable
reversible irreversible
Answer: irreversible
sincere insincere
Answer: insincere
agreeable disagreeable
Answer: disagreeable