The sample space is the set of all 2-symbol words, where the first symbol is T or H and the second symbol is any integer number 
from 1 to 6 inclusively.


In all, there are 2*6 = 12 elements in the sample space.


{T1, T2, T3, T4, T5, T6, H1, H2, H3, H4, H5, H6}