I have a text file that looks something like this:

A21  103  
A22  103  
A23  103  
A25  103  
A26  103  
A27  103  
12.3     7.3     .0289     179     2     5     1     4     3     1    
+ 0     0     0
A28  103  
 4.5     4.2     .0000     479     1     0     0     0     0     0    
+ 0     0     0
10.2     9.6     .0188     250     2     5     0     4     2     3    
+ 0     0     0
10.2     9.6     .0188     250     2     5     0     4     2     3    
+ 0     0     0
A29  103  
 4.5     4.2     .0000     479     1     0     0     0     0     0    
+ 0     0     0
10.2     9.6     .0188     250     2     5     0     4     2     3    
+ 0     0     0
A30  103  
A32  103  
 4.5     4.2     .0000     479     1     0     0     0     0     0    
+ 0     0     0
10.2     9.6     .0188     250     2     5     0     4     2     3    
+ 0     0     0
A33  103  
 4.5     4.2     .0000     479     1     0     0     0     0     0    
+ 0     0     0
10.2     9.6     .0188     250     2     5     0     4     2     3    
+ 0     0     0
A34  103  
A36  103  
 4.5     4.2     .0000     479     1     0     0     0     0     0    
+ 0     0     0

[download]

The data is separated by tabs or spaces

I wish to be able to read in the file, remove the lines with two batches of text(eg.'A21 103') unless they are followed by a longer line of data(eg.'12.3 7.3 .0289'...).

If they are followed by a longer line of data, to read the two batches of text and insert them at the beginning of the subsequent longer lines until the next short batch is found. And so on through the file.

In this example, I want the output therefore to look like this:

A27  103  12.3     7.3     .0289     179     2     5     1     4     3
+     1     0     0     0  
A28  103   4.5     4.2     .0000     479     1     0     0     0     0
+     0     0     0     0
A28  103  10.2     9.6     .0188     250     2     5     0     4     2
+     3     0     0     0
A28  103  10.2     9.6     .0188     250     2     5     0     4     2
+     3     0     0     0
A29  103    4.5    4.2     .0000     479     1     0     0     0     0
+     0     0     0     0
A29  103  10.2    9.6      .0188     250     2     5     0     4     2
+     3     0     0     0
A32  103   4.5     4.2     .0000     479     1     0     0     0     0
+     0     0     0     0
A32  103  10.2     9.6     .0188     250     2     5     0     4     2
+     3     0     0     0
A33  103   4.5     4.2     .0000     479     1     0     0     0     0
+     0     0     0     0
A33  103  10.2     9.6     .0188     250     2     5     0     4     2
+     3     0     0     0
A36  103   4.5     4.2     .0000     479     1     0     0     0     0
+     0     0     0     0

[download]

The data lines may be in batches of one, two, three, four or even five lines before the short line which is actually a kind of a heading for the data that follows below it.

(The 'headings' without 'data' below them are not required and need to be dropped from the output, as stated above.)

I cannot find a way to do this.

I have googled a lot for examples but without any success. Hope someone can teach me how to do this.

Thank you very much for your help.

In reply to Insert Text which is Read from the Line Above by jlb333333

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