I have my input csv file as below: 
RS,52,,,P,,402,,,,,,,,HK,,900,G,,,,,,,1,1,1,CM,,,,,Wearing,,,44,DD,,,J
+PYK

RAd,CON,,St,567,JPYK,,,Kana,Kana,456,JPKY,,1111111111

RC,CNDY,1,5657,WM 85PLY,112,43200

RC,VN,1,6633,WM 8PL5L,389,2010

RC,VN,1,1921,WMNS T40PL ,289,2010

[download]
I want my output into two parts. First part is duplicating the entire row of RS header and RAd header with the number that matches with the entire row of RC. Suppose header RC has 3 rows , I want RS and RAd to have 3 rows and then combine each line as below: 
RS,52,,,P,,402,,,,,,,,HK,,900,G,,,,,,,1,1,1,CM,,,,,Wearing,,,44,DD,,,J
+PYK

RAd,CON,,St,567,JPYK,,,Kana,Kana,456,JPKY,,1111111111

RC,CNDY,1,5657,WM 85PLY,112,43200 

RS,52,,,P,,402,,,,,,,,HK,,900,G,,,,,,,1,1,1,CM,,,,,Wearing,,,44,DD,,,J
+PYK

RAd,CON,,St,567,JPYK,,,Kana,Kana,456,JPKY,,1111111111

RC,VN,1,6633,WM 8PL5L,389,2010 

RS,52,,,P,,402,,,,,,,,HK,,900,G,,,,,,,1,1,1,CM,,,,,Wearing,,,44,DD,,,J
+PYK

RAd,CON,,St,567,JPYK,,,Kana,Kana,456,JPKY,,1111111111

RC,VN,1,1921,WMNS T40PL ,289,2010

[download]
Lastly I want to join the above lines of RS,RAd and RC header.Final output should look like the one below: 
RS,52,,,P,,402,,,,,,,,HK,,900,G,,,,,,,1,1,1,CM,,,,,Wearing,,,44,DD,,,J
+PYK, RAd,CON,,St,567,JPYK,,,Kana,Kana,456,JPKY,,1111111111, RC,CNDY,1
+,5657,WM 85PLY,112,43200 

RS,52,,,P,,402,,,,,,,,HK,,900,G,,,,,,,1,1,1,CM,,,,,Wearing,,,44,DD,,,J
+PYK, RAd,CON,,St,567,JPYK,,,Kana,Kana,456,JPKY,,1111111111, RC,VN,1,6
+633,WM 8PL5L,389,2010 

RS,52,,,P,,402,,,,,,,,HK,,900,G,,,,,,,1,1,1,CM,,,,,Wearing,,,44,DD,,,J
+PYK, RAd,CON,,St,567,JPYK,,,Kana,Kana,456,JPKY,,1111111111, RC,VN,1,1
+921,WMNS T40PL ,289,2010

[download]

In reply to duplicating the rows and joining three lines into one using perl script by rpinnam

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.