SEQUEL Help needed

I was looking for some help to create an SEQUEL to find out how many
records would get added when I run a program.

I am not sure how to best formulate my problem, but let me try:

I have one large file (180 million recs) with fields F1, F2, F3, F4

It is defined as Unique on fields F2, F3, F4

I will be writing a program to create additional records in file if for a
particular value of F1, there exist more than one value of F2 and each
combination of F1/F2 does not have same F3/F4 combination.

I want to know how many additional records will be created by the program.

I think it is best explained by examples of data in the records in file:

Assume field F1 has values An, F2 has Bn, F3 has Cn and F4 has Dn

Example1:
A1, B1, C1, D1
No new records will be created for A1

Example2:
A2, B2, C2, D2
A2, B2, C3, D3
A2, B3, C2, D2
A2, B3, C3, D3
No new records will be created for A2

Example 3:
A3, B4, C4, D4
A3, B4, C5, D5
A3, B5, C6, D6
Following new records will be created for A3
A3, B4, C6, D6
A3, B5, C4, D4
A3, B5, C5, D5

Example 4:
A4, B6, C7, D7
A4, B6, C8, D8
A4, B7, C7, D7
Following new records will be created for A4
A4, B7, C8, D8

I hope I haven't made a typo and made myself clear.

Even though it MAY be possible to insert these records thru SEQUEL, it
won;t be allowed in production environment, so I will have to write a
program.

I am just trying to figure up-front out how many records will be added by
the program.

Thanks in advance.

Vinay