How many hydrogens does the following line structure contain? 
Definitions:
Representativeness Heuristic
A cognitive shortcut that involves judging the probability of an event by its similarity to a prototype or an example.
Little League Player
A child or adolescent who participates in Little League Baseball, a youth sports organization that promotes baseball and softball worldwide.
Heuristic
A mental shortcut or rule of thumb that allows people to solve problems and make judgments quickly and efficiently.
Algorithm
A step-by-step procedure or formula for solving a problem or accomplishing a specific task.
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