Carlson eats jam twice as fast as the Kid, and he eats cake three times faster than the Kid. One day, they finished a jar of jam and a cake. Carlson started with the cake, while the Kid started with the jam. After finishing the cake, Carlson helped the Kid finish the jam, and it took them two hours in total. On another occasion, they had the same jar of jam and the same cake, but the Kid ate the cake while Carlson started with the jam. After eating the jam, Carlson helped the Kid finish the cake. How long did it take them this time?
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