Keys: the sign's own letter (o c a i n r s 8 9 4 k h t), g tall but unsure which, f fragment, x not writing, / don't know, Backspace back. Judge only the ink inside the red box. A single short stroke is a sign (i), not a fragment: see "How a run of strokes is cut" in the Key. Doubt is useful: pick "I don't know" rather than guess, and use "Add a note" for a remark so it is kept apart from the answer.