#!/usr/bin/perl -w
use strict;

#of course this assumes the example file is in the exact 
#format expected. The following line is basically the 
#line containing a lone 'c' at the beginning and a whole
#bunch of spaces (your comment cards).
#remember that $/ can't handle regexp... though it sure
#would be cooler if it did.
local $/ = "c                                                                               ";

while (<DATA>){
	print "\n=====chunk start=======\n";
	print $_;
	print "\n=====chunk stop=======\n";
}

#from the example data you gave.
__DATA__
m8    92234.30c 0.0071  92235.30c 0.9300  92238.30c 0.06289                     
      8016.30c 2.0      42000.30c  2.5                                          
c                                                                               
c   BeO(2.86) Axial Reflector TD=3.01 / 95%=2.86                                
m9    4009.30c 0.5  8016.30c 0.5                                                
mt9   beo.01t                                                                   
c                                                                               
c   BeO(?AllgenCalc) Radial Reflectpr TD=3.01 / 95%=2.86                        
m10    4009.30c 0.5  8016.30c 0.5                                               
mt10   beo.01t                                                                  
c                                                                               
c   He/Xe(.0218) (72/28) ~.55 mol/L at 300K,1.38MPa, 39.6 g/mol                 
m11     2004.30c 0.7                                                            
       54124.30c 0.00027  54126.30c 0.00027  54128.30c 0.00576                  
       54129.30c 0.07932  54130.30c 0.01224  54131.30c 0.06354                  
       54132.30c 0.08067  54134.30c 0.03132  54136.30c 0.02661                  
c                                                                               
c   Sodium(0.929) RoomTemp = .97 g/cc,  at melt = .929 g/cc                     
c    Liquid = .929 - .000244*(t-371) (t in K) Handbook Ch&Ph                    
m12   11023.30c   1.0                      $ Na (.929 g/cc) frozen/void         
c                                                                               
c   Lithium(.515) RoomTemp = .534 g/cc,  at melt = .515 g/cc                    
c    Liquid = .515 - .000101*(t-454) (t in K) Handbook Ch&Ph                    



##</code><code>##


=====chunk start=======
m8    92234.30c 0.0071  92235.30c 0.9300  92238.30c 0.06289                     
      8016.30c 2.0      42000.30c  2.5                                          
c                                                                               
=====chunk stop=======

=====chunk start=======

c   BeO(2.86) Axial Reflector TD=3.01 / 95%=2.86                                
m9    4009.30c 0.5  8016.30c 0.5                                                
mt9   beo.01t                                                                   
c                                                                               
=====chunk stop=======

=====chunk start=======

c   BeO(?AllgenCalc) Radial Reflectpr TD=3.01 / 95%=2.86                        
m10    4009.30c 0.5  8016.30c 0.5                                               
mt10   beo.01t                                                                  
c                                                                               
=====chunk stop=======

=====chunk start=======

c   He/Xe(.0218) (72/28) ~.55 mol/L at 300K,1.38MPa, 39.6 g/mol                 
m11     2004.30c 0.7                                                            
       54124.30c 0.00027  54126.30c 0.00027  54128.30c 0.00576                  
       54129.30c 0.07932  54130.30c 0.01224  54131.30c 0.06354                  
       54132.30c 0.08067  54134.30c 0.03132  54136.30c 0.02661                  
c                                                                               
=====chunk stop=======

=====chunk start=======

c   Sodium(0.929) RoomTemp = .97 g/cc,  at melt = .929 g/cc                     
c    Liquid = .929 - .000244*(t-371) (t in K) Handbook Ch&Ph                    
m12   11023.30c   1.0                      $ Na (.929 g/cc) frozen/void         
c                                                                               
=====chunk stop=======

=====chunk start=======

c   Lithium(.515) RoomTemp = .534 g/cc,  at melt = .515 g/cc                    
c    Liquid = .515 - .000101*(t-454) (t in K) Handbook Ch&Ph                    


=====chunk stop=======