data _null_;
x='Hillcrest Avenue Hillcrest Auckland ';
y=prxchange('s/\w+\s+\w+$//',1,strip(x));
put x= y=;
run;
In practice, you might want to check that you have more than 2 words in the address, before doing this:
address = substr(address, 1, length(address) - 2 - length(scan(address, -1)) - length(scan(address, -2)));
data _null_;
x='Hillcrest Avenue Hillcrest Auckland ';
call scan(x, -2, position, length);
substr(x,position)=' ';
put x=;
run;
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