def ransom_note(magazine, ransom):
    for word in ransom:
        if not w in magazine:
            return False
        else:
            magazine.remove(word)
    return True

m, n = map(int, raw_input().strip().split(' '))
magazine = raw_input().strip().split(' ')
ransom = raw_input().strip().split(' ')

print "Yes" if ransom_note(magazine, ransom) else "No"