((load-truck package7 bos-truck bos-po)
 (load-truck package2 pgh-truck pgh-po)
 (fly-airplane airplane2 pgh-airport la-airport)
 (load-truck package5 bos-truck bos-po)
 (load-truck package8 la-truck la-po)
 (load-truck package3 pgh-truck pgh-po)
 (load-truck package4 pgh-truck pgh-po)
 (load-truck package6 bos-truck bos-po)
 (load-truck package1 pgh-truck pgh-po)
 (drive-truck bos-truck bos-po bos-airport bos)
 (drive-truck pgh-truck pgh-po pgh-airport pgh)
 (drive-truck la-truck la-po la-airport la)
 (unload-truck package7 bos-truck bos-airport)
 (unload-truck package6 bos-truck bos-airport)
 (unload-truck package4 pgh-truck pgh-airport)
 (unload-truck package3 pgh-truck pgh-airport)
 (unload-truck package1 pgh-truck pgh-airport)
 (unload-truck package5 bos-truck bos-airport)
 (unload-truck package8 la-truck la-airport)
 (load-airplane package8 airplane2 la-airport)
 (load-airplane package1 airplane1 pgh-airport)
 (load-airplane package4 airplane1 pgh-airport)
 (load-airplane package3 airplane1 pgh-airport)
 (fly-airplane airplane2 la-airport bos-airport)
 (fly-airplane airplane1 pgh-airport bos-airport)
 (load-airplane package7 airplane2 bos-airport)
 (load-airplane package5 airplane2 bos-airport)
 (unload-airplane package1 airplane1 bos-airport)
 (load-airplane package6 airplane1 bos-airport)
 (unload-truck package2 pgh-truck pgh-airport)
 (fly-airplane airplane2 bos-airport pgh-airport)
 (fly-airplane airplane1 bos-airport la-airport)
 (unload-airplane package7 airplane2 pgh-airport)
 (unload-airplane package5 airplane2 pgh-airport)
 (unload-airplane package3 airplane1 la-airport)
 (unload-airplane package8 airplane2 pgh-airport)
 (load-truck package1 bos-truck bos-airport)
 (load-truck package8 pgh-truck pgh-airport)
 (load-truck package3 la-truck la-airport)
 (unload-airplane package4 airplane1 la-airport)
 (load-airplane package2 airplane2 pgh-airport)
 (load-truck package7 pgh-truck pgh-airport)
 (load-truck package5 pgh-truck pgh-airport)
 (drive-truck bos-truck bos-airport bos-po bos)
 (fly-airplane airplane2 pgh-airport bos-airport)
 (fly-airplane airplane1 la-airport pgh-airport)
 (drive-truck la-truck la-airport la-po la)
 (drive-truck pgh-truck pgh-airport pgh-po pgh)
 (unload-truck package8 pgh-truck pgh-po)
 (unload-truck package1 bos-truck bos-po)
 (unload-truck package7 pgh-truck pgh-po)
 (unload-airplane package6 airplane1 pgh-airport)
 (unload-truck package5 pgh-truck pgh-po)
 (unload-airplane package2 airplane2 bos-airport)
 (unload-truck package3 la-truck la-po))