T9.2 4 of 4

Now, try some simple derivations applying the four new rules:

I1
input:

output:
(none)

 Iaa
I2
input:

output:
Iab

Iba
I3
input:

output:
Iab
Ibc

Iac
I4
input:

output:
Iab
Pa

Pb



Justification:       Sentence: