The famous joke programming language HQ9+ has only 4 commands. In this problem we will explore its subset — a language called HQ...
The only line of the input is a string between 1 and 10<sup class="upper-index">6</sup> characters long.
s = input()
h = s.count('H')
q = s.count('Q')
print("No" if h % 2 or q % 2 else "Yes")