Not Greek; the "backwards R" and "backwards N" are Cyrillic letters; the language is Ukrainian. The four letter word on the back is Ukrainian for "Kiev", the capital city. A token muck like this one is shown on the
Wikipedia page for the Kiev Metro.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis