sort.py

import sys
import re

INPUT_FILE = sys.argv[1]

with open(INPUT_FILE) as inf:
    origs_lines = inf.readlines()

lines = []

for line in origs_lines:
    lines.append(re.sub(r'(<link.*>)(<strong>.*<\/strong>)', r'\2\1', line))

lines.reverse()

inner = []

for line in lines:
    if "<header" in line:
        print line
        for l in inner:
            print l
        inner = []
    elif "<strong>" in line:
        inner.append(line)
for l in inner:
    print l