P = policeman
T = thief
D = dad
M = mother
B = boy
G = girl

> = to
OS = other side (destination)
BS = back to start

1 P + T > OS
2 P > BS
3 P + B > OS
4 P + T > BS
5 D + B > OS
6 D > BS
7 D + M > OS
8 M > BS
9 P + T > OS
10 D > BS
11 D + M > OS
12 M > BS
13 M + G > OS
14 P + T > BS
15 P + G > OS
16 P > BS
17 P + T > OS