CHIP Mux4Way {
    IN a, b, c, d, sel0, sel1;
    OUT out;

    PARTS:
	Not(in=sel0,out=notsel0);
	Not(in=sel1,out=notsel1);
	
	And(a=notsel0,b=notsel1,out=outA);
	And(a=sel0,b=notsel1,out=outB);
	And(a=notsel0,b=sel1,out=outC);
	And(a=sel0,b=sel1,out=outD);
	
	And(a=outA,b=a,out=outA1);
	And(a=outB,b=b,out=outB1);
	And(a=outC,b=c,out=outC1);
	And(a=outD,b=d,out=outD1);
	Or(a=outA1,b=outB1,out=out1);
	Or(a=outC1,b=outD1,out=out2);
	Or(a=out1,b=out2,out=out);
}