grouping a many to many relation set

Hi, I am having a problem grouping a many to many relationship with
payments and receipts, where a payment can be for multiple receipts,
and a receipt can have multiple payments. I got a list of records that
are involved in such relations, but now I don't know how to group them
so that all payments and rececipts belonging to the same group are
properly grouped. Here's the list:

bankbookdetid | receiptid
---------------+-----------
147 | 25
157 | 25
157 | 622

321 | 100
332 | 101
332 | 100

2156 | 573
2156 | 574
2156 | 575
1710 | 575
1710 | 576

I have already grouped them according to the way they should be
grouped: bankbook payments and receipt amounts that are part of the
same transaction (they are a subset of a large set of payments and
receipts, most 1-1, 1-n and n-1, which are solved relatively easy).

As you can see there are a few records that interconnect the payments
and receipts:

bankbookdetid | receiptid
---------------+-----------
157 | 25

332 | 100

2156 | 575
1710 | 575

I tried now for some time how a SQL statement could give a set grouped
as you can see above, but I just don't seem to see it. Is there anyone
around over here that had a similar situation and has found a solution?
Should I try to do this in PL/SQL? Is there a solution for the problem
anyway?

-johan