import java.util.ArrayList;
import java.util.List;
public class Order {
public static String[] str = {"1","2","3","4"};
public static void main(String[] args){
System.out.println("-------------");
for(String s:str){
System.out.println(s+" , ");
}
System.out.println("-------------");
for(String s:get2byte()){
System.out.print(s+" , ");
}
System.out.println("-------------");
for(String s:get3byte()){
System.out.print(s+" , ");
}
System.out.println("-------------");
for(String s:get4byte()){
System.out.print(s+" , ");
}
}
public static List<String> get2byte(){
List<String> list = new ArrayList<String>();
for(int i=0;i<str.length;i++){
for(int j=0;j<str.length;j++){
list.add(str[i]+str[j]);
}
}
return list;
}
public static List<String> get3byte(){
List<String> list = new ArrayList<String>();
for(int i=0;i<str.length;i++){
for(int j=0;j<str.length;j++){
for(int k=0;k<str.length;k++){
list.add(str[i]+str[j]+str[k]);
}
}
}
return list;
}
public static List<String> get4byte(){
List<String> list = new ArrayList<String>();
for(int i=0;i<str.length;i++){
for(int j=0;j<str.length;j++){
for(int k=0;k<str.length;k++){
for(int h=0;h<str.length;h++){
list.add(str[i]+str[j]+str[k]+str[h]);
}
}
}
}
return list;
}
}