Begin by choosing a longitude from -10 thru 60 by entering it (only multiples of 5). Then, name the Europe cities of at least 10K population from that longitude thru 5 degrees east of it – i.e. if you chose ’40’ you would be naming the cities from 40 to 45 longitude. Object is to achieve the highest population.
Enter a longitude multiple of 5 from -10 to 60 to begin (i.e. '-10').