Crossing the bridge at night is difficult!

Logic Level 3

Five people come to a river in the night. There is a narrow bridge, it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person A can cross the bridge in one minute, B in two minutes, C in four minutes, D in seven minutes, and E in eleven minutes. When two people cross the bridge together, they must move at the slower person's pace. What is the minimum time for them to cross the bridge (in minutes)?

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