Which letter is the fifth to the right of the letter that stands eleventh from the right end of the English alphabet?

The letter eleventh from the right end stands at place 26 − 11 + 1 = 16, which is P. Five places to the right of P is place 21, which is U. Counting five places to the left of P instead gives place 11, which is K. Taking the eleventh from the right to be at place 15 gives O and then T, and taking it to be at place 17 gives Q and then V; Q is also what you get by stopping one place short of the five.