A tank has a capacity of 18000 gallons. Wanda and Ms. B decided to pump water from a pond to fill the tank in two days. On the first day, working in shifts, Wanda filled 1/4 of the tank's capacity with water, and Ms. B pumped 3/4 as much water as Wanda pumped into the tank that day. On the second day, Wanda pumped 2/3 of the amount of water she pumped on the previous day, while Ms. B only pumped 1/3 of the number of gallons she pumped on the first day. How many gallons of water are remaining for the tank to be full?
Please reason step by step, and put your final answer within \boxed{}.
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