Ravi, like in the last response I wrote to you, the * matches 0 or more times, not just 1 or more times. Your use of the * is what is causing your confusion. Your pattern will match all of those lines in most engines.

You want to try making use of some of the other quantifies available in the engine you are working with. + is a good start because it matches 1 or more times. ? is 0 or 1 time, and a lot of modern engines allow you to use {n,m} which is at least n times but no more than m times or {n} and {n,} which are exactly n times, or n or more times.