import java.util.List;
import java.util.stream.Stream;
import java.util.Arrays;
public class Main {
private static List<String> genList(String contents) {
return Arrays.asList(
String.valueOf(new char[3]).replaceAll("\0", contents).split(""));
}
private static Stream<List<String>> genListStream(String contents) {
return Stream.of(genList(contents)).parallel();
}
private static Stream<String> genStringListStream(String contents) {
return genList(contents).parallelStream();
}
public static void main(String[] args) {
Stream.of("0123456789".split(""))
.parallel()
.map(Main::genList)
// .flatMap(Main::genListStream)
// .flatMap(Main::genStringListStream)
.forEach(System.out::println);
}
}
