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