Deleting lines by matching 3rd and 4th character only

Question

I am running a script that fetches me the data as given below,

1400d2b8
1f4d1e2507
1200781e

As you can see the 3rd and 4th character is 0 in line 1 and line 3. I am trying to write a single line script that prints the line except the lines containing 00. In this case it should only print 1f4d1e2507.

Answer 1

There are lots of ways, e.g.,

awk '/^..00/{ next; }{ print; }' < mydata
sed '/^..00/d' < mydata

Answer 2

grep can do that:

grep -v '^..00' inputfile