Mnemonic symbol: a balloon. The Queen of Hearts is disappointed by her balloons. She expected them to float upwards, but in the space station's bathroom, They float randomly in all directions.
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Marie Curie has gone crazy from the loneliness in space. In front of the space station, she sits inside of a large wooden box, wearing a cowboy hat and playing a 胡兀尔 fiddle, thinking that she's participating in a square dance in the wild west.