I want to read a formatted text file with number and strings and I want to separate data

Dear all,

I want to cut each id of data into a different variable.

=======================I want to the output like =================================

data 1 =

ID 2010

2010 12 29 17 35 13

1 123.456 0.456 2 2 0 0 0

1 123.456 0.456 3 1 0 0 111

1 120.456 1.456 2 2 0 0 0

1 120.456 1.456 3 1 0 0 111

1 122.456 2.456 2 2 0 0 0

1 122.456 2.456 3 1 0 0 111

data 2 =

ID 2013

2013 12 29 10 25 15

1 103.456 4.456 2 2 0 0 0

1 113.456 3.456 3 1 0 0 111

1 183.456 6.456 2 2 0 0 0

1 173.456 3.456 3 1 0 0 111

1 193.456 6.456 2 2 0 0 0

1 173.456 9.456 3 1 0 0 111

:

:

:

:

etc

============== below are the few lines of the text =======================

Note:The sentence after % is for guidance (Not in the data)

====================================================================

a1 ID 2010 % id of data 1

a2 2010 12 29 17 35 13 % (Starting Year Month Day and Starting Hour Minute Second ) of data 1

0 123.456 123.456 270.00 92.0 0

1 123.456 0.456 AB 2 2 0 0 0

1 123.456 0.456 AB 3 1 0 0 111

:

:

--- line with No. 1 will repeat until line with No. 0 appears

0 123.456 123.456 270.00 92.0 0

1 120.456 1.456 AB 2 2 0 0 0

1 120.456 1.456 AB 3 1 0 0 111

:

:

--- line with No. 1 will repeat until line with No. 0 appears

0 123.456 123.456 270.00 92.0 0

1 122.456 2.456 AB 2 2 0 0 0

1 122.456 2.456 AB 3 1 0 0 111

a3 % end of data 1 (a3 : Always used in end of data )

a1 ID 2013 % id of data 2

a2 2013 12 29 10 25 15 % (Starting Year Month Day and Starting Hour Minute Second ) of data 2

0 123.456 123.456 270.00 92.0 0

1 103.456 4.456 CD 2 2 0 0 0

1 113.456 3.456 CD 3 1 0 0 111

:

:

--- line with No. 1 will repeat until line with No. 0 appears

0 123.456 123.456 270.00 92.0 0

1 183.456 6.456 CD 2 2 0 0 0

1 173.456 3.456 CD 3 1 0 0 111

:

:

--- line with No. 1 will repeat until line with No. 0 appears

0 123.456 123.456 270.00 92.0 0

1 193.456 6.456 CD 2 2 0 0 0

1 173.456 9.456 CD 3 1 0 0 111

a3 % end of data 2 (a3 : Always used in end of data )

:

:

:

etc

I will be thankful if anyone can help.