using System using System Collections Generic using System Linq using

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace ConsoleApplication {
    public class Program {
        private const int n = 3;
        private static int[] b = new int[n];
        private static bool[] u = new bool[n];
        
        public static void Main(string[] args) {
           generate(0);
        }
        
        private static void print() {
            for (int j = 0; j < n; j++) {
                Console.Write(b[j] + " ");
            }
            Console.WriteLine();
        }
 
        private static void generate(int i) {
            if (i == n) {
                print();
                return;
            }
            for (int j = 0; j < n; j++) {
                if (!u[j]) {
                    b[i] = j;
                    u[j] = true;
                    generate(i + 1);
                    u[j] = false;
                }
            }
        }
    }
}