class A {
	public static int a = 1, b = 2;
	
	public int x = 5;
	
	public A( int x ) {
		System.out.println( "Invoke A( " + x + " )" );
		this.x = x;
		}
	public A() {
		System.out.println( "Invoke A()" );
		a++;
		x++;
		}
	
	public String toString() { return "A.toString(): " + x; }
	public void set( int x ) { this.x = x; }
	public int get() { return x; }
	public String f( int i ) { return "A.f( " + i + " )"; }
	public String f( double x ) { return "A.f( " + x + " )"; }
	}

class B extends A {
	public static int a = 3, d = 4;
	
	public int x = 100;
	
	public B( int x ) {
		System.out.println( "Invoke B( " + x + " )" );
		d++;
		this.x = x;
		}

	public void set( int x ) { this.x = x; }
	public int get() { return x; }
	public String f( char c ) { return "B.f( '" + c + "' )"; }
	public String f( double x ) { return "B.f( " + x + " )"; }
	}

public class Main {
	public static void main( String[] args ) {

		A a1 = new A( 55 );
		A a2 = new A();
		B b1 = new B( 66 );
		A b2 = b1;

		System.out.println( "A.a = " + A.a );
		System.out.println( "A.b = " + A.b );
		System.out.println( "B.a = " + B.a );
		System.out.println( "B.d = " + B.d );
		System.out.println();
		
		System.out.println( "a1.x = " + a1.x );
		System.out.println( "a2.x = " + a2.x );
		System.out.println( "b1.x = " + b1.x );
		System.out.println( "b2.x = " + b2.x );
		System.out.println();
		
		System.out.println( "a1 = " + a1 );
		System.out.println( "a2 = " + a2 );
		System.out.println( "b1 = " + b1 );
		System.out.println( "b2 = " + b2 );
		System.out.println();
		
		// 'A' is ASCII 65
		System.out.println( "a1.f( 'A' ) = " + a1.f( 'A' ) );
		System.out.println( "b1.f( 'A' ) = " + b1.f( 'A' ) );
		System.out.println( "b2.f( 'A' ) = " + b2.f( 'A' ) );
		System.out.println();
		
		System.out.println( "a1.f( 65 ) = " + a1.f( 65 ) );
		System.out.println( "b1.f( 65 ) = " + b1.f( 65 ) );
		System.out.println( "b2.f( 65 ) = " + b2.f( 65 ) );
		System.out.println();
		
		System.out.println( "a1.f( 65.0 ) = " + a1.f( 65.0 ) );
		System.out.println( "b1.f( 65.0 ) = " + b1.f( 65.0 ) );
		System.out.println( "b2.f( 65.0 ) = " + b2.f( 65.0 ) );
		System.out.println();
		
		b1.set( 123 );
		b2.set( 456 );
		System.out.println( "b1.x = " + b1.x );
		System.out.println( "b2.x = " + b2.x );
		System.out.println( "b1.get() = " + b1.get() );
		System.out.println( "b2.get() = " + b2.get() );
		}
	}