组成蛋白质的20种氨基酸 20 amino acids that make up protein

Difficulty level: impossible and mean-spirited. Can you guess these countries based on a partial view of their flag?

In each randomized group, name any answer which matches the first category to reveal the second category, etc...

Drag the flag onto the correct state. Careful, though! One wrong move and the game ends.

Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.