Output subsequent values when variable occurs the first time a dataset

[Anita_n]

This is my final solution

data want(drop=i);
set have;

array v(*) _character_ ;
if '4' in v;

do i=1 to dim(v);
  if v{i}='4' then do;
   v{i}= '';
   leave;
end;
end;

run;