Group
Use your mouth to take a measurement of this group. Just stretch your mouth out and around every single person. Get 'em all in there.
I hope this group is full of people who enjoy being inside someone else's mouth, because they're gonna be pretty mad when you let them out if they aren't.
だん, とん
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This group is so big it takes you till dawn (だん) to get your measurement: they weigh a ton (とん) too!
Imagine letting this group of, now very wet, people out of your mouth one by one. They don't seem to care that they weigh a ton! That's a large measurement, they should be proud.