import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Locale;
import java.util.stream.Stream;

public class Main {
	public static void main(String[] args) {
		DateTimeFormatter dtf = DateTimeFormatter.ofPattern("M/d/y", Locale.ENGLISH);
		Stream.of(
					"01/01/1",
					"01/01/19",
					"01/01/192",
					"01/01/1921",
					"01/01/19211"
		).forEach( s -> System.out.println(LocalDate.parse(s, dtf)));
	}
}