
/* multiplexor */

Switch 6a sw4 ZERO;
Not    7a sw4 not-out-a;
Switch 8a sw5 ZERO;
Not    7a sw5 not-out-b;

And 1c not-out-a not-out-b out-1;
And 2c not-out-a sw5 out-2;
And 3c sw4 not-out-b out-3;
And 4c sw4 sw5 out-4;

Probe 1d out-1;
Probe 2d out-2;
Probe 3d out-3;
Probe 4d out-4;
