Choose any 10K+ European city, then continue naming 10K+ cities which are within 100km of any previously named city. Naming notes: many places have similar names. For example, “Brest” is not unique. To choose Brest, France, simply type “brestfr”, using the first two letters of the country name, or ‘uk’ for the UK (same as for Ukraine). Also, some answers require typing in other answers you may not want to guess. In this case, if you want to answer “Hamburg”, simply type it..”Ham, Belgium” will not be chosen. If you want simply “Ham” type ‘ham.’ with the period at the end. LASTLY, in a couple cases there are multiple places of the same name in a single country. Newcastle, UK is an example. To choose the largest Newcastle (typically the one you want), type ‘newcastleuk1’ – the rest are ‘newcastleuk2’ and so on (need the country too for any cases of multiple cities in one country, even if no other country has cities of that name). So basically, if the city isn’t coming up after you type the name, try adding a “.” after, or the country first two letters, or in some cases the country letters plus a number.