The letter Y in braille
dots 1-3-4-5-625 of 26⠽
Y in braille is dots 1-3-4-5-6. Y is D plus dots 3 and 6.
A capital Y has the capital sign, dot 6, in the cell before it: ⠠⠽.
In Grade 2 (contracted) braille, y standing alone as a word means “you”.
Don't mix it up
Now write it yourself
Tap the dots for Y, then Enter. On a keyboard, press F D S / J K L together and let go.
Remember it, don't just look it up
Y is in Letters U–Z. Braille a Day brings it back tomorrow to answer from memory, then again just before you'd forget. Five minutes a day.