5m Zen
4x 2 y 2 8y 16
4x 2 y 2 8y 16 pictures 5
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4x 2
4x 2 y 2 8y 16
4x 2 4x 1 y 2 8y 16
x 2 y 2 4x 8y 16 0
4x 2 y 2 8y 16
