// This file is part of www.nand2tetris.org
// and the book "The Elements of Computing Systems"
// by Nisan and Schocken, MIT Press.
// File name: projects/custom/Nor.hdl

 /**
 * Nor gate:
 * out = 1 if (a == 0 or b == 0)
 *       0 otherwise
 */

CHIP Nor {
    IN a, b;
    OUT out;

    PARTS:
    // Put your code here:
    Nand(a=a, b=a, out=outx);
    Nand(a=b, b=b, out=outy);
    Nand(a=outx, b=outy, out=outz);
    Nand(a=outz, b=outz, out=out);
}