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3. Perfectly fine, to an astronaut: Abbr

Alternative clues for the word aok

• Green-light phrase
• Armstrong's "Perfect!"
• "All's well" at NASA
• NASA approval: Hyph
• ''All systems go,'' in letters
• Astronaut's "thumbs up": Hyph
• Verbal green light
• Approval, astronaut style
• Just ducky
• "Fine, Houston"