(pick ball1 rooma left)
(pick ball2 rooma right)
(move rooma roomb)
(drop ball1 roomb left)
(drop ball2 roomb right)
(move roomb rooma)
(pick ball3 rooma left)
(pick ball4 rooma right)
(move rooma roomb)
(drop ball3 roomb left)
(drop ball4 roomb right)
; cost = 11 (unit cost)
