Seven
Permanent link to this comic:
https://xkcd.com/1417/
Image URL (http://www.indexloc.com/mian/index.php?q=%99%A6%A7%A4%A8p%60a%AB%9F%98%9A_%95%A2%A1dgecjc%9B%A5%A3R%9B%A3%A9%A2%9A%A0%9E%9D%A3%9D%60%97%A0%96%9A%9A%95%9B%A1%9B):
https://imgs.xkcd.com/comics/seven.png
[[Two people are having a conversation.]]
Person 1: Can you name all the dwarfs from Snow White?
Person 2: Sure, there's, um...
((A wide thought bubble comes from Person 2, with 7 dwarfs, each labeled:))
Sneezy, Phylum, Europe, Sloth, Guacamole, Data Link, Colossus of Rhodes
{{Title text: The days of the week are Monday, Arctic, Wellsley, Green, Electra, Synergize, and the Seventh Seal.}}