Problem with reformating file

I have a problem with file which was reformated during some operation and looks like this:

Code:

18450 0600060009                       25  0 768188519       768188519       0030020124 000 000   10
77019           73587                       25  0 73165           730740506       0160100051 029 000
74049                                       25  0 73950                           1040030047 030 000
14048           14048                       25  0 11833           11833                      022 000
18450 0600060027                       25  0 709948778       709948778       0010030064 000 000   10
                73330                       25  0 0050312875      77020                      000 000
18450 0600040020                       25  0 703820853       703820853       0030020125 000 000   10

And I need it to look like this

Code:

18450 0600060009                       25  0 768188519       768188519       0030020124 000 000   10
77019      73587                       25  0 73165           730740506       0160100051 029 000
74049                                  25  0 73950                           1040030047 030 000
14048      14048                       25  0 11833           11833                      022 000
18450 0600060027                       25  0 709948778       709948778       0010030064 000 000   10
           73330                       25  0 0050312875      77020                      000 000
18450 0600040020                       25  0 703820853       703820853       0030020125 000 000   10

What happened was that column B has shifted 5 places to the right.
I've tried to solve it with a simple

Code:

 while read do printf 

but the problem is how to read empty spaces into the variable. It looks like sed would be a great tool for that, but I just don't know how to do it as any of column where number of digits is greater then 3 can be empty.

 

That format looks very fragile. But here is my attempt. I'm assuming the example contains all cases.

Code:

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Read from standard input, write to standard output.
# Assume column B (column number 2) is either 10 digits or empty.
# If column B is not 10 digits remove 5 spaces after column A.
#
# Tested on Python 3.4.2 Debian GNU/Linux 8 Jessie.
# Tapio Lehtonen / Osk Satatuuli 2017

import sys
debug = False

for str in sys.stdin.readlines():
    if debug: print(">>>", str);
    if str[0].isspace():
        if debug: print("first pos empty")
        #Column A is empty
        #Print slice from char position 5 to end of string
        print(str[5:], end="") # Newline already in original
    elif str[6].isspace():
        if debug: print("pos 7 is empty")
        #Column B is empty or not full 10 digits
        #Print Column A, skip 5 positions and print rest of string
        print(str[:5], end="")
        print(str[10:], end="")
    else:
        if debug: print("Print as is")
        #Print string as is
        print(str, end="")