this one is not for your eyes. it is for your patience. there is a tunnel. it has doors. each door tells you, once and cryptically, how to open the next one. it will never tell you twice. every door breathes a number at you. carry the breath. fold it into your answer or the door stays shut. knock to begin: POST /api/start . it starts your clock. you cannot stop the clock. carry what it gives you in the headers it names. wrong is wrong is wrong; the doors all say the same thing when they say no. at the end is a floor with no bottom you can see. find where it is lowest. tell us the point, not the depth. closer wins. o7