Two line elements and one line Charlie elements

I am aware that some people still use old satellite tracking software that needs one line Charlie input data.

Does anyone have exact matching examples of Two line data and One line Charlie data, so that I can compare ?

I am trying to make a page to do the conversion, see:

https://www.satsig.net/orbit-research/two-line-to-one-line-charlie-elements.htm

This page is in prototype form and gives wrong answers now.