HARD (ER) KANJI - JLPT 2 KYUU

Think of states being separated by rivers.
 
 Stroke order:
しゅう - a state (US's states)
欧州 ou shuu - Europe (used in newspapers)
九州 kyuu shuu - the most southern of the 4 major Japanese islands
フロリダ州 furorida shuu - the state of Florida