proc main(args)
{
    var a = "Hello";
    "a.length() = ", a.length(), '\n';
    "a.subr(1,3) = ", a.subr(1,3), '\n';
    "a.reshape(3,5):\n", a.reshape(3,5), '\n';
    "1.concat(2).concat(3) = ", (1).concat(2).concat(3), '\n';
}