import java.util.*;
import java.io.*;
import java.math.*;
public class Main
{
static void permute(List<Integer> arr, int k){
for(int i = k; i < arr.size(); i++){
Collections.swap(arr, i, k);
permute(arr, k+1);
Collections.swap(arr, k, i);
}
for (int i = 0; i < arr.size(); i++) {
System.out.print(arr.get(i));
}
System.out.println();
/*
if (k == arr.size() -1){
System.out.println(Arrays.toString(arr.toArray()));
}
*/
}
public static void main(String[] args){
Main.permute(Arrays.asList(1,2,3), 0);
}
}
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