You are given two sentences. You have to find if there is entailment or agreement of the Hypothesis by the Premise. From the given pair of sentences, you should identify if there is enough information in the Premise to support the claim made in the Hypothesis. The Premise may not exactly be the same as Hypothesis. Your task is to return 'entails' if the premise supports hypothesis else return 'neutral'.

Q: Premise: These are valves at the two exits of the heart that prevent backflow into the ventricles. 
 Hypothesis: Heart valves prevent the backflow of blood from happening in the heart.

A: entails
****
Q: Premise: four valence electrons are shared between two atoms. 
 Hypothesis: Four valence electrons can be found in a carbon atom.

A: neutral
****
Q: Premise: Like all reptiles , tuatara are ectothermic, meaning that their body temperature fluctuates according to the environmental temperature , rather than being maintained internally. 
 Hypothesis: Reptiles are described by the term ectothermic, which means their internal temperature depends on the temperature of their environment.

A:
entails
****