/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static void main(String[] args) {
        int arraySize = 5;
        Set<String> set = new HashSet<>();
        for (int y = 0; y <arraySize ; y++) {
            for (int x = 0; x < arraySize; x++) {
                if (y == x) continue; // такие if  в начале каждого цикла, чтобы исключить повторы цифр внутри последовательности
 
                for (int i = 0; i < arraySize; i++) {
                    if (x == i || y == i) continue;
 
                    for (int j = 0; j < arraySize; j++) {
                        if (i == j || x == j || y == j) continue;
 
                        for (int k = 0; k < arraySize; k++) {
                            if (j == k || i == k || x == k || y == k) continue;
 
                            String e = "" + x + i + j + k;
                            set.add(e);
                        }
                    }
                }
 
            }
        }
 
        for (String s : set) {
            System.out.println(s);
        }
 
        System.out.println("Размер: " + set.size());
 
    }
}

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