Type 'easy' or 'hard' to begin the quiz. Easy is a 1-degree range, hard is a 0.5-degree range. Then, name any 10K+ Europe city in each longitude range which fits the category label for each square.
LETTER: means the city starts with that letter.
NUMBER RANGE: (such as 2-5, 10+) means the city contains that many letters (excluding spaces and special characters).
POPULATION RANGE: (such as 250-500K) means the city has that range for its population.
2+ WORDS means the city name has 2 or more words (words denoted by a space or hyphen).
At the end of the quiz the largest population missed answer will show in each range.
And Ghent to London
this plus the others you mentioned are too far to qualify