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print u"\u001b[30;1m A \u001b[31;1m B \u001b[32;1m C \u001b[33;1m D \u001b[0m"
，详情可参考safew官方版本下载
Part of a Soviet-era spacecraft is likely to have re-entered the Earth's atmosphere after being stuck in orbit for more than half a century, the European Space Agency said.，详情可参考heLLoword翻译官方下载
protected Integer compute() {