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power resources » water resources
power resource » power source, water resource, power sources
2 costs » _ costs, 2 cost, 4 costs
1 costs » 10 costs, 12 costs, _ costs
power resources » water resources
power resource » power source, water resource, power sources
2 costs » _ costs, 2 cost, 4 costs
1 costs » 10 costs, 12 costs, _ costs