3
NewNewYork 4
airport 1 1 museum 3
museum 0 2 park 4 hospital 5
park 2 1 hospital 3
hospital 4 0
Miami 4
airport 0 2 swamp 7 beach 10
swamp 6 1 hospital 8
beach 3 1 hospital 5
hospital 0 0
Rolla 5
airport 0 2 lake 5 forest 8
lake 1 1 forest 3 
forest 1 2 river 6 hospital 9
river 1 1 hospital 3 
hospital 0 1 lake 5