This is what i have tried so far and im in the middle of its half way maybe far from the end and have no idea how to continue .And just so u know im a beginner so...

public class tutorial {
  static final int m = 1000;
  public static void main(String[] args) {
         int input;
         int x,y;
         Sys.pln("Type in an input between 0 and 27 ");
         input =Sys.readInt();
         do
         {
             if ((input <0) ||(input >27))
             Sys.pln(" its not valid ! try again");
         }while (input !=input);
         for (int i=0;i < m; i++){
           x = input%10;
           y = ( input/10 ) + x;
           Sys.pln("Here is the list of the sum:"+y);

         }

    tutorial tutorial1 = new tutorial();
  }

    }

your logic but u need to use "datainputstream" as
DataInputStream in=new DataInputStream;
n=Integer.parseInt(in.readLine());

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