Writing a program for my compilers class.

Using these input files

input file 1:
A -> Aa | B | C | EMPTY
B -> Ab | C
C -> m

input file 2:
A -> BCj | gDB
B -> bCDE | EMPTY
C -> DaB | ma | DB
D -> dD | EMPTY
E -> gAf | i

input file 3:
E -> E+T | T
T -> T*F | F
F -> (E) | a

Here is the code that is giving me trouble 

while(<INFILE>){
   chomp();
   m/([A-Z]) -> (.*)/;  # take the line, put the righthand side
                        # into $1, put lefthand side into $2
   $GRAMMAR{$1} = $2;   # enter into hash table GRAMMAR
}

print "gonna print some info: \n";
while(($k, $v) = each %GRAMMAR) {
   print "$k\n";
}

[download]

Input file 1 and 2 create hash tables with the keys in the order of the input file. The output of #1, for example, is: 

A
B
C

[download]
But the output of #3 is: 
F
T
E

[download]

Can anyone help me figure out why?

Thanks, -tl

In reply to problem with hash keys by june_bo

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