The lost property office at the station on the last train of the night, and the Station Master has had enough. Swap neighbouring things to line up three hats, three hoodies, three snack tins, three flasks, three single shoes or three train tickets across the box. Fours get the cleaner in with a broom that clears a whole row, fives get the Station Master, who clears every one of that thing in the building, and every cascade multiplies the haul. Beat the round target before the last train goes. Spare moves are fireworks, because it is the end of the line.