#!/bin/bash

echo "<!-- Blank lines MUST be filled with SPACES or paste(1) fails -->"
echo "<b><pre>"

tmp1=tmp_1.$$
grep -v '^<' $1 |
sed '
    s/$/      /
    1s/  $/||/
    25s/  $/||/
    $s/  $/||/
' > $tmp1

tmp2=tmp_2.$$
grep -v '^<' $1 |
sed 's/^/ /' > $tmp2

paste -d' ' $tmp1 $tmp2 |
sed -e 's/||$//' -e 's/  *$//'

rm -f $tmp1 $tmp2

echo "</pre></b>"