Carl and Sheryl share there duties equally.

As with any partnership they each do half the work and they each work half a day.

Carl works the first 12 hours and Sheryl works the other 12 hours.

Bruce just works one 24 hour shift a day...he's younger.

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"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run"

http://sandmandecals.com/