(board person5 plane1 city2)
(refuel plane1)
(fly-slow plane1 city2 city0)
(board person1 plane1 city0)
(board person2 plane1 city0)
(fly-slow plane1 city0 city1)
(debark person2 plane1 city1)
(board person4 plane1 city1)
(debark person5 plane1 city1)
(fly-slow plane1 city1 city3)
(debark person1 plane1 city3)
(debark person4 plane1 city3)
; cost = 12 (unit cost)
