I am very slow at reading notes on a music sheet... first need to use EGBDF and FACE to find it is a "D" then translate to a "Rei", and then find the key on the keyboard. And then I just stumble upon something that is called piano stickers... since I have a Casio CT-S1 ...
From bottom to top, the treble clef has the letters FACE between the lines and EGBDF on the lines, and the bass clef contains ACEG between and GBDFA on the lines. Although the letters differ depending on whether you read treble or bass notes, they make more sense when you put them tog...