sequencial data runs seperated by text headers - ASCII import

I have ASCII data that is 2 columns with x and y values, with sequencial runs inline in the ascii, just separated by another text header, X Y. Like this:

x y

1  8

2  9

x  y

1  7

2  6

When I just import it, the data is truncated at the 2nd header. I want to both import all of the data, and seperate the sequencial runs into coloumns, like this

x  y  x  y 

1  8  1  7

2  9  2  6