Im trying to get some quote data for various certificates, i.e A2M07X and DZ8TEH. In order to receive the data I use the Eikon Python API, especially the function get_data, where I create the RIC by transforming the SIN, i.e. from A2M07X to DEA2M07X.F. However, I do not know when to use ".F" and when to use "=F". What is the difference between these two exchange codes?