Jump Between World Capitals: Closest Triplet Different Continent Map

Start with the three capital cities that are closest together despite being in three different continents. Then do the same for the remaining capitals. Keep going!
When you guess an answer, at the end of it you are shown the initial letter of the answer below it (the initials of the first triplet are shown in heading row above it)


When you are left with capitals from just two contients you need to pair up the remaining ones but you won't have the initial letter hints.