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()
if s.count('H') != 0 and s.count('Q') != 0:
    if s.count('H') != s.count('Q'):
        print("No")
    else:
        print("Yes")
else:
    print("Yes")