Tuesday Night Trivia

Tonight's challenge:

There are three pairs of countries in our world for which the two countries share a border and have names with a common first and last letter. Name two of the three pairs.

For example, if Austria and Albania—both of whose names start and end in a—shared a border, that pair would qualify. (Just to be clear, Austria and Albania don't share a border and don't qualify.) I should also note that I'm going by countries' English names (e.g. "Germany" instead of "Deutschland.") Avoid looking at a map, except to check your answers (including spelling).