VBA: How to transform a one column full dictionary into one column per letter?

I have a full dictionary. All the words (360 000) are in one column.

I'd like to have Column B with all words starting with "a", column C with all words starting with b...

I am trying to do a loop or something... but... It is just too long.

Any tips? Or did someone already do this vba macro?

Tks,

Stéphane.