Lenny is playing a game where he flips a coin and rolls a number cube labeled 1 through 6. he listed the possible outcomes in the sample space shown below:
{(h, 1), (h, 2), (h, 3), (h, 4), (h, 5), (t, 1), (t, 2), (t, 3), (t, 4), (t, 5)}
which two elements did he leave out?

a: (h, 1) and (h, 6)
b: (h, 6) and (t, 6)
c: (h, 6) and (t, 1)
d: (t, 4) and (t, 6)