public class NestedLoops {
    public static void main(String[] args) {
        for (int line = 1; line <= 5; line++) {  // vertical loop
            // dots
            for (int j = 1; j <= -1 * line + 5; j++) {
                System.out.print(".");
            }

            // number
            System.out.print(line);

            // dots
            for (int j = 1; j <= line - 1; j++) {
                System.out.print(".");
            }
            
            System.out.println();
        }



/*
            // some number of dots
            for (int j = 1; j <= -1 * line + 5; j++) {
                System.out.print(".");
            }
            
            // a number
            System.out.println(line);
        }
        
        /*
        for (int y = 1; y <= 2; y++) {
            for (int x = 1; x <= 3; x++) {
                System.out.println(x + ", " + y);
            }
        }
        
        for (int i = 1; i <= 10; i++) {
            for (int j = 1; j <= 5; j++) {
                System.out.print((i * j) + " ");
            }
            System.out.println();  // to end the line
        }
        */
    }
}