I have two text files. Text-file-1 contains strings (one string per line);

C 010

C 020

C 024

.

.

.

Text-file-2 contains data in following format;

C 005 Carbon

D Carbon 1

D Carbon 2

D Carbon 3

D Carbon 4

C 010 Hydrogen

D Hydrogen 1

D Hydrogen 2

C 017 Oxygen

D Oxygen 1

C 020 Nitrogen

D Nitrogen 1

D Nitrogen 2

D Nitrogen 3

C 024 Sulphur

D Sulphur 1

D Sulphur 2

.

.

.

Text-file-1 contains 30 lines but Text-file-2 contain huge data, and in the same format as I mentioned. I can grep the text in Text-file-2 found in Text-file-1 using following command;

awk 'NR==FNR { A[$2]=1; next }; A[$2]' Text-file-1 Text-file-2 > filename

Output for this script

C 010 Hydrogen

C 020 Nitrogen

C 024 Sulphur

.

.

.

My Desired output is;

C 010 Hydrogen

D Hydrogen 1

D Hydrogen 2

C 020 Nitrogen

D Nitrogen 1

D Nitrogen 2

D Nitrogen 3

C 024 Sulphur

D Sulphur 1

D Sulphur 2

.

.

.

Now, I need an extension of this command, which could print all lines (starting with "D"), including and after this line. All lines in Text-file-2 are starting with a letter (C or D). This letter is not useful for me, but I kept it. Kindly help.