For each block, four common words are listed in alphabetical order that are anagrams of each other. Type any key to start, then see how many anagrams you can get.
Sten gun, a proper noun. We'll add "common" to the instructions - outside of the world of crosswords and WWII historians it doesn't get a whole heap of airing :)
Thanks! I'm really enjoying adding to my vocabulary today. Have added an underline to "common" in the instructions. If anyone comes up with tsne, an extinct marmoset previously endemic to southern Kamchatka, we'll upgrade "common" to bold as well.