Here are couple of sample files.

file 1)(full occured 3 times vs. the second file where it occured only once!

FULL322418809544200     444FM15852298FP02  1033019970623200307072003EI
+CHIN                                                                 
+  BEDFORD              MA01731     484BB02785SUN MID-ATLANTI         
+ 919 EAST MAIN ST.             HDQ 4309                      RICHMOND
+             VA23219     FULL322418809544200      TX79902     OA910UT
+17124QWEST PHOENIX RHPS            20 E THOMAS ST 5TH FLOOR          
+                          PHOENIX              AZ85012               
+                                      FULL322418809544200     444FM15
+852298FJ02  1033019970707200307072003EICHIN                    ST.   
+          HDQ 4309                      RICHMOND             VA23212 
+ &&
[download]

File 2) FULL occured only once.

FULL322418214114900     444FM15852013FI02  1120619930326200307012003FA
+RAGO                   458ON08815FLEET    8022667304690 NAAMANS RD   
+                                           CLAYMONT             DE197
+03     &&
[download]

Each Files ends with "&&"

Edit, BazB added code tags.