SQL & PL/SQL

Hi everyone

My Database is Oracle 12c R 12.1.0.2

I am looking for a regular expression or Substr/Instr query to find repeating pattern from a long string and eliminate them

Input                                                                                      Output

9999 W San Brazil St Ste A Ste A:48:77774:4444               9999 W San Brazil St Ste A:48:77774:4444  

with t as (

           select '9999 W San Brazil St Ste A Ste A:48:77774:4444' addr from dual

          )

-- end of on-the-fly data sample

select  addr,

        regexp_replace(addr,'^(.+?)\1*$','\1') sub_str

  from  t

above query doesn't return the Output I am looking for

Can someone please guide me

Thanks

J1604