Single Query for getting Range Values

Is there a way - a single query which I can use to fetch data from the below table, in this format

Expected Output format

AB      01Jan2010       04Jan2010
AB      06Jan2010       07Jan2010
AB      09Jan2010       11Jan2010
CD      11Jan2010       12Jan2010.

create table test_acy(acy_cd varchar2(5),start_dt date,end_dte date);

insert into test_acy values('AB','01Jan2010','02Jan2010');
insert into test_acy values('AB','02Jan2010','03Jan2010');
insert into test_acy values('AB','03Jan2010','04Jan2010');
insert into test_acy values('AB','06Jan2010','07Jan2010');
insert into test_acy values('AB','09Jan2010','10Jan2010');
insert into test_acy values('AB','10Jan2010','11Jan2010');

insert into test_acy values('CD','11Jan2010','12Jan2010');

Expected Output format

AB      01Jan2010       04Jan2010
AB      06Jan2010       07Jan2010
AB      09Jan2010       11Jan2010
CD      11Jan2010       12Jan2010.

I may need the row as a block,which separates on a discontinuous date range.ie I am having AB block from 01Jan to 04Jan, again a block from 06Jan to 07Jan,like that.

Many Thanks,

Sreejith Nair

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