I believe the WBF convention card guidelines specifies writing 4531 for "4 spades, 5 hearts, 3 diamonds, and 1 club", and (4531) for any ordering of suits. Personally, I believe in using as few syntax conventions as possible, so I have decided to stick with that. Certainly, I do not approve of the convention introduced in a Danish book on, erm..., conventions, where 4-5-3-1 means any ordering and 4-5-3-1 (in italics) means specific ordering. That is very hard to recognize when reading printed or on-screen material, and impossible to reproduce in hand-writing. I can hardly imagine that style gaining a large following.