回答編集履歴
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test
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```Java
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.nio.file.StandardOpenOption;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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public static void main(final String[] args) {
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