6c6
<      440000 ps:	a=0 b=1 e=1 f=1 -> sig1=1 sig2=1 -> y=0
---
>      400001 ps:	a=0 b=1 e=1 f=1 -> sig1=1 sig2=1 -> y=0
11a12,13
>      710001 ps:	a=0 b=1 e=1 f=1 -> sig1=1 sig2=1 -> y=0
>      754001 ps:	a=0 b=0 e=1 f=1 -> sig1=0 sig2=1 -> y=1
