@Chronos the different letters represent the colours of a wolf in the order; eyes, accent, under, top, base. Each letter represents a colour, so if I said I had an AAAAA wolf, all colours would be the same, whereas an ABCDE wolf means 5 different colours for each slot. Another example, an ABCDA would would mean that the eyes and the base have the same colour. Basically these kinds of 'codes' are used to advertise wolves with double, triple or even quadruple or quintuple colours as that is something that can be considered rare and desirable.