1,2,3,4,5,6,7,8,9,10

1 little, 2 little, 3 little buses
4 little, 5 little, 6 little buses
7 little, 8 little, 9 little buses
10 little buses

10,9,8,7,6,5,4,3,2,1,

10 little, 9 little, 8 little buses
7 little, 6 little, 5 little buses
4 little, 3 little, 2 little buses
1 little bus

1 little, 2 little, 3 little buses
4 little, 5 little, 6 little buses
7 little, 8 little, 9 little buses
10 little buses