I've seen amounts written in words like 1BTC 1 BTC but not like BTC1 BTC 1 so that's easy.

I'm asking if the best place for symbol's at the beginning or end of amounts. I've seen both styles. If you're writing amounts where's the best place supposed to be BTC1.23456789 or 1.23456789BTC. Which way do you prefer using the Bitcoin symbol.