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1: Active solar heating system 2: Community 3: Soil 4: Bird abatement 5: Weed 6: Range 7: Feeder 8: Lead 9: Japan 10: Electricity 11: Process 12: Contamination 13: Change 14: Periplaneta americana 15: Hazard 16: Atmosphere 17: Fishery 18: Development 19: Action 20: Function (As of 11:03)