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1: Bird abatement 2: Alaska 3: Soil 4: Range 5: Maximum mid-expiratory flow rate 6: Community 7: Weed 8: Periplaneta americana 9: Feeder 10: Japan 11: Contamination 12: Change 13: Fishery 14: Human 15: Lead 16: Function 17: Process 18: Environment 19: Electricity 20: Atmosphere (As of 00:09)
