public class test
{
    public static void main(String args[])
    {
        for(int a =  0 ;a< 5 ;a++)
             System.out.println("1.a = " + a );
        for(int a =  0 ;a< 5 ;++a)
             System.out.println("2.a = " + a );
        for(int a =  5 ;a> 0 ;a --)
 
             System.out.println("3.a = " + a );
        for(int a =  5 ;a> 0 ; --a)
 
             System.out.println("4.a = " + a );
    }
}