Hearing nothing at the north door, you pop it open.

You enter a 10ft wide room, 30 ft long, with another wooden door on the far side. In the room is four kobolds(F1, E1, E2, C2). A small fire is flickering on the floor(D2)
They had no idea you were coming, so the nearest(F1) dies in the surprise round.

Init for the remaining three, in order.
(1d20+1)[17]
(1d20+1)[18]
(1d20+1)[13]