/* The following three functions assume 0 is false and 1 is true */

/* And */
define a(x, y) {
    return(x * y)
}

/* Or */
define o(x, y) {
    return(x + y - x * y)
}

/* Not */
define n(x) {
    return(1 - x)
}

define f(a, b) {
    "a and b: "
    a(a, b)
    "a or b: "
    o(a, b)
    "not a: "
    n(a)
}