‘Für Elise’ sheet music with letters and notes together.
Ludwig v. Beethoven’s original, complete, and unaltered ‘Bagatelle No. 25 in A-minor.’
Letter note-labels on sheet music can be extremely helpful, sometimes almost indispensable, to people who have limited music-reading experience, and/or have no access to a teacher, and/or have limited mobility, or learning hindrances of any kind.