Hi my friends; What I want to ask you about: In Russian, there are some words that have double "c" as: ру́сский while many words have single "c" in their structure: стул. Previously, I was thinking that the double "c"s were used for the double pronunciation of the sound [s], but I guess, there is no difference between the pronunciation of the single "c" and the double "c" 's. Both of them, I think, pronounced as a single [s] sound. Then, the "cc" works for what? Or it is just a thingy that does not depend on any rule and simply, I am supposed to memorize this type? Thanks in advance.