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1: Active solar heating system 2: Bird abatement 3: Soil 4: Community 5: Weed 6: Range 7: Feeder 8: Japan 9: Lead 10: Periplaneta americana 11: Process 12: Change 13: Electricity 14: Fishery 15: Contamination 16: Function 17: Atmosphere 18: Action 19: Development 20: Hazard (As of 19:49)