def generate_song():
    s = []
    for i in range(99, 0, -1):
        line1 = f"{i} bottle{'s' if i > 1 else ''} of beer on the wall, {i} bottle{'s' if i > 1 else ''} of beer."
        s.append(line1)
        next_num = i - 1 if i - 1 else 'no more'
        plural = 's' if (i - 1 != 1 and i - 1 != 0) else ''
        line2 = f"Take one down and pass it around, {next_num} bottle{plural} of beer on the wall."
        s.append(line2)
    s.append("No more bottles of beer on the wall, no more bottles of beer.")
    s.append("Go to the store and buy some more, 99 bottles of beer on the wall.")
    return '\n'.join(s) + '\n'

H_str = "Hello, World!"
song_str = generate_song()

def can_split_into_h_and_song(s, h_str, song_str):
    len_h = len(h_str)
    len_song = len(song_str)
    n = len(s)
    dp = [False] * (n + 1)
    dp[0] = True
    for i in range(n):
        if dp[i]:
            if i + len_h <= n and s[i:i+len_h] == h_str:
                dp[i+len_h] = True
            if i + len_song <= n and s[i:i+len_song] == song_str:
                dp[i+len_song] = True
    return dp[n]

def generate_hq9_code(s):
    if s == H_str:
        return 'H'
    if s == song_str:
        return '9'
    if s == 'Q':
        return 'Q'
    if can_split_into_h_and_song(s, H_str, song_str):
        code = []
        i = 0
        len_h = len(H_str)
        len_song = len(song_str)
        while i < len(s):
            if s.startswith(H_str, i):
                code.append('H')
                i += len_h
            elif s.startswith(song_str, i):
                code.append('9')
                i += len_song
            else:
                return '-1'
        return ''.join(code)
    if len(s) >= 2 and s[0] == 'Q':
        remaining = s[1:]
        code_candidate = 'QH'
        if s.startswith(code_candidate) and remaining[len(code_candidate)-1:] == H_str:
            return code_candidate
        code_candidate = 'Q9'
        if s.startswith(code_candidate) and remaining[len(code_candidate)-1:] == song_str:
            return code_candidate
    if len(s) >= 2 and s.startswith('QH'):
        remaining = s[2:]
        if remaining == H_str:
            return 'QH'
    if len(s) >= 2 and s.startswith('Q9'):
        remaining = s[2:]
        if remaining == song_str:
            return 'Q9'
    return '-1'

n = int(input())
s = input().strip()

result = generate_hq9_code(s)
print(result)