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1: Bird abatement 2: Soil 3: Community 4: Range 5: Weed 6: Periplaneta americana 7: Alaska 8: Maximum mid-expiratory flow rate 9: Lead 10: Feeder 11: Japan 12: Change 13: Process 14: Contamination 15: Function 16: Fishery 17: Electricity 18: Atmosphere 19: Development 20: Action (As of 05:47)