In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Ex Input:
Fact1: seeing requires light, Fact2: Vision is our ability to see., Question: What is required for vision? (A) light (B) goggles (C) food (D) smell (E) hormones (F) Protein (G) color (H) hue

Ex Output:
A


Ex Input:
Fact1: cooking food requires adding heat energy, Fact2: Heat is essentially the source of energy., Question: Doing what to food requires adding the source of energy? (A) burning (B) burying (C) degrading (D) hydration (E) boiling (F) Light (G) sharing (H) cooking

Ex Output:
H


Ex Input:
Fact1: a stopwatch is used to measure time, Fact2: All times are measured in seconds., Question: What does a stopwatch measure? (A) percents (B) feedback (C) seconds (D) as a base (E) arrival time (F) days (G) months (H) Fractions

Ex Output:

C