Hi there, I believe there is a "Attach" button at the end of the text box (upon drafting of post) if you scroll down a little more?
Anyway, in regards to your request for katha for Kumanthong, can I suggest for you to learn the following?
Puttasa Bucha
Tammasa Bucha
Sanggusa Bucha
Pati-Pati Bucha
Pawantumae U-ga-sa U-ga-sa.
Probably start to learn to chant this katha and research it (the meaning) first, then in future after a few months, can ask the seniors around here for more info. See you around.