Regex problem

Question

Hi,
I want to filter text lines with regex but I couldnt be able to solve. Text is like below;

*************************
this is sample
  123.123.123.123 pe 1,
  34.34.34.34,
  3.3.3.3 te,
another text
anether text too
 45.45.45.45
*************************

I want to get the lines which has started with 2 space and continuing decimal character. How may I do this?