/* 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) throws java.lang.Exception
	{
		int[] r1 = {1,3};
		 int[] r2 = {4,5};
		 char[] r3 = {'a'};
 
		 int tamano1 = r1.length;
		 int tamano2 = r2.length;
		 int tamano3 = r3.length;
 
		 for(int i=0; i<=tamano1; i++){
		 	for(int j=0; j<=tamano2; j++){
		 		for(int x=0; x<=tamano3; x++ ){
		 			system.out.println(r1[i]+r2[j]+r3[x]);
		 		}
 
		 	}
		 }
	}
}

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