``` or it:= 0 to 9 do
if itoa(it)[1] in strtochars('BCE03C310FAEBA451DF2BDEE7B3A0DE2B5ECB8BD') then
write('found: '+ itoa(it)+' ');
writeln(CRLF)
for it:= ord('A') to ord('F') do
if chr(it) in strtochars('BCE03C310FAEBA451DF2BDEE7B3A0DE2B5ECB8BD') then
write('found: '+ chr(it)+' ')`````
use the function to check a set 👍