Python regex to get only numbers

[tantony]

I have the following script

import re

w = 'KTPA 081653Z 00000KT 10SM BKN022TCU BKN040 OVC001RMK 28/23 A2990 FEW070 RMK AO2 SLP125 TCU SCT080 NW-NE T02830228'
k = re.findall("FEW\d+|SCT\d+|BKN\d+|OVC\d+", w)
print(k)

When I run it, I'm getting

['BKN022', 'BKN040', 'OVC001', 'FEW070', 'SCT080']

, but I only want the integers from it so that it looks like this

['022', '040', '001', '070', '080']

. Once I get the integers, I can sort it to get the lowest number.

How would I do that?