d=0,e=0
C1 >    // also test input from $input();
C1 >    force d = (a | b | c);
C2 >    force e = (a | b | c);
C3 >    #10 $stop;
C4 >    .
d=1,e=1
C4 >    release d;
C5 >    release e;
C6 >    c = 0;
C7 >    #10 $finish;
C8 >    .
d=0,e=0