how to include the delimiter in the output value when scan function used

[knveraraju91]

data one;
input a $10.;
datalines;
aaaa+bbbbb
cccc+ddddd
;
data two;
set one;
b=scan(a,1,'+');
c=scan(a,2,'+');
run;

Dear,

For the above data step, i need to output for b and c vaiables as below.  The delimiter should also be included in first word. Please suggest. 

b                      c

aaaa+            bbbbb

cccc+             ddddd

[data_null__]

b=cats(scan(a,1,'+'),'+');

[r_behata]

data two;
set one;
pos=find(a,'+');
b=substrn(a,1,pos);
c=substrn(a,pos+1);
drop pos;
run;