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There are 7 octaves plus 4 keys for each piano keyboard, each octave contains 7 white keys and 5 black keys.
The white key in front of the the two black keys in each octave is C
There are 7 octaves plus 4 keys for each piano keyboard, each octave contains 7 white keys and 5 black keys.
The white key in front of the the two black keys in each octave is C