(refuel plane2 city1 fl1 fl2)
(refuel plane2 city1 fl2 fl3)
(refuel plane2 city1 fl3 fl4)
(board person4 plane2 city1)
(fly plane2 city1 city0 fl4 fl3)
(board person6 plane2 city0)
(fly plane2 city0 city3 fl3 fl2)
(board person5 plane2 city3)
(debark person4 plane2 city3)
(board person1 plane2 city3)
(fly plane2 city3 city2 fl2 fl1)
(debark person6 plane2 city2)
(debark person5 plane2 city2)
(debark person1 plane2 city2)
(fly plane2 city2 city1 fl1 fl0)
; cost = 15 (unit cost)
