TMTOWTDI. Applying the substitution, s/^[^ ]*\K {5}//, to each line, achieves the realignment you show. 

$ cat pm_1207104_data.txt
18450 0600060009                       25  0 768188519       768188519
+       0030020124 000 000   10
77019           73587                       25  0 73165           7307
+40506       0160100051 029 000
74049                                       25  0 73950               
+            1040030047 030 000
14048           14048                       25  0 11833           1183
+3                      022 000
18450 0600060027                       25  0 709948778       709948778
+       0010030064 000 000   10
                73330                       25  0 0050312875      7702
+0                      000 000
18450 0600040020                       25  0 703820853       703820853
+       0030020125 000 000   10

[download]
$ perl -pe 's/^[^ ]*\K {5}//' pm_1207104_data.txt
18450 0600060009                       25  0 768188519       768188519
+       0030020124 000 000   10
77019      73587                       25  0 73165           730740506
+       0160100051 029 000
74049                                  25  0 73950                    
+       1040030047 030 000
14048      14048                       25  0 11833           11833    
+                  022 000
18450 0600060027                       25  0 709948778       709948778
+       0010030064 000 000   10
           73330                       25  0 0050312875      77020    
+                  000 000
18450 0600040020                       25  0 703820853       703820853
+       0030020125 000 000   10

[download]

— Ken

In reply to Re: Reformat file with empty spaces by kcott
in thread Reformat file with empty spaces by Anonymous Monk

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