Some possible ways:
- regexp('dcda4adcqq', '(.{2,}).?(??@fliplr($1))', 'match', 'once');
- regexp('dcda4adcqq', '(.{2,}).?(??@fliplr($1))', 'match'); disp(ans);
- result = regexp('dcda4adcqq', '(.{2,}).?(??@fliplr($1))', 'match'); result{1}
- celldisp(regexp('dcda4adcqq', '(.{2,}).?(??@fliplr($1))', 'match'))