CHIP Xor {
    IN a, b;
    OUT out;

    PARTS:
	Not(in=a,out=nota);
	Not(in=b,out=notb);
	And(a=a,b=notb,out=aAndnotb);
	And(a=nota,b=b,out=notaAndb);
	Or(a=aAndnotb,b=notaAndb,out=out);
}