Code Golf: Finite-state machine!

Answer 1

Python, 218 characters

import sys
T=sys.stdin.read()
P=T.split()
S=P[0]
n="\n"
for L in P[-1]if T[-2]!=n else"":
 i=T.find(n+S+" "+L)
 if i<0:print S,L;S=n;break
 S=T[i:].split()[2];print S,L,"->",S
print ("REJECT","ACCEPT")[S[0].isupper()]