java regular expression
<p>a
b
k4
2c
a10u
u20
30
4u9uwr
uvw567uvw</p>

<p>for the above lines I need out put like below how to write the regular expression i tried with strLine.replaceAll("[a-z]", "").trim(); it is removing digit stating and ending with charecters but  except the first 2 line a, b are not removing and aslo i am doing interger.parseInt(string) that alos i need to handle. "Any one please suggest how to write regular expression for the above senario ASAP"
Expected output:
4
2
10
20
30
49
567</p>
