Congratulations to everyone who participated in last week's challenge. Special congratulations to u/CristianNedelcu who managed to find two cities with four different sets of triplets: Santiago de los Caballeros and Santo Domingo Tehuantepec.

This week's challenge is to name as many cities with no duplicate letters, that is, no more than one instance of each letter. Letters with diacritics are not considered unique, e.g. 'e' and 'é' are considered the same letter. Spaces, dashes, apostrophes, and other punctuation are not considered letters.

Usual challenge rules:

1. A city is acceptable as long as any accepted variant of its name meets the challenge criteria, even if the displayed version of the name doesn't.
2. If you use Google or the "every state/country" option during your game, please say so in your comment.
3. If you mention any specific city names in your comment, please wrap them in spoiler tags.

Would people be interested in starting a little competition with these challenges? I'm thinking of awarding a special flair each week to (a) the person who names the most cities without the aid of Google or the 'every city' option, and (b) the person who meets a bonus challenge, e.g. for this week it could be 'city with no duplicates with the most number of unique letters'. What do you all think?