Question 1134830
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When you solve such problems and become familiar with them for the first time,

it is important and valuable to get from somebody a compact description of the full space of events.



In this problem, the full space of events is the space (the set) of all pairs  (L,i),

where letter L is one of two symbols H or T and "i" is one of 6 integer numbers 1, 2, 3, 4, 5, 6.



"L" and "i" take their values INDEPENDENTLY: "L" takes two values, while "i" takes 6 values,

so the entire space of events consists of 2*6 = 12 pairs / (elements).
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