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No sharps or flats
Key of C major or A minor
One sharp (F#)
Key of G major or E minor
Two sharps (F#,C#)
Key of D major or B minor
Three sharps (F#,C#,G#)
Key of A major or F# minor
Four sharps (F#,C#,G#,D#)
Key of E major or C# minor
Five sharps (F#,C#,G#,D#,A#)
Key of B major or G# minor
Six sharps (F#,C#,G#,D#,A#,E#)
Key of F-sharp major or D# minor
Seven sharps (F#,C#,G#,D#,A#,E#,B#)
Key of C-sharp major or A# minor
One flat (Bb)
Key of F major or D minor
Two flats (Bb,Eb)
Key of B-flat major or G minor
Three flats (Bb,Eb,Ab)
Key of E-flat major or C minor
Four flats (Bb,Eb,Ab,Db)
Key of A-flat major or F minor
Five flats (Bb,Eb,Ab,Db,Gb)
Key of D-flat major or Bb minor
Six flats (Bb,Eb,Ab,Db,Gb,Cb)
Key of G-flat major or Eb minor
Seven flats (Bb,Eb,Ab,Db,Gb,Cb,Fb)
Key of C-flat major Ab minor