What will be the output of the program?

class SC2 
{
    public static void main(String [] args) 
    {
        SC2 s = new SC2();
        s.start();
    }

    void start() 
    {
        int a = 3;
        int b = 4;
        System.out.print(' ' + 7 + 2 + ' ');
        System.out.print(a + b);
        System.out.print(' ' + a + b + ' ');
        System.out.print(foo() + a + b + ' ');
        System.out.println(a + b + foo());
    }

    String foo() 
    {
        return 'foo';
    }
}