The zoo director's face was green with anger. The new animal guard had put some of the wild animals in the wrong cages. "Put them back into the right cages" ordered the director, "but take care that at no time two animals are in the same cage." (see: "99 Logeleien von Zweistein", Hamburg 1968)
Note that between adjacent cages there are doors. The three cages presently housing fox, kangaroo, and donkey are not adjacent to each other. You can move into the adjacent empty cage by clicking. To the right is the desired final configuration.
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Desired Position: 
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