; search time: 0.01
; plan length: 16
(fly plane1 city1 city0 fl6 fl5)
(board person2 plane1 city0)
(fly plane1 city0 city3 fl5 fl4)
(board person1 plane1 city3)
(debark person2 plane1 city3)
(fly plane1 city3 city0 fl4 fl3)
(board person3 plane1 city0)
(fly plane1 city0 city1 fl3 fl2)
(board person4 plane1 city1)
(fly plane1 city1 city2 fl2 fl1)
(fly plane1 city2 city3 fl1 fl0)
(debark person3 plane1 city3)
(debark person4 plane1 city3)
(refuel plane1 city3 fl0 fl1)
(fly plane1 city3 city2 fl1 fl0)
(debark person1 plane1 city2)
