选择奇数列，然后将连续行的字段放在一起

I have a data file that I need to transform with regular expressions. More specifically, I need to maintain the first 6 columns the same, and from the 7th column on, select only the odd columns, and then put together the fields of each pair of consecutive rows. I know it sounds a bit complicated so I'll clarify this through an example. This is my original data file (it could have any number of columns):I have a data file that I need to transform wit