DIR-E5XA-YYWS-6BBG-8K45R
seriously,is this a human?
and what's wrong with your rules of calculate？
no. 347
16 ? 15 + x + 1 = 33
answer is + 16
wtf?
It happened to me so many time i found the solution but the system says it's wrong.
for DIR-E5XA-YYWS-6BBG-8K45R i think he made a script to automatically found the solution.