what's the total number of "d"s in:
symphony presented many best-selling mobile devices with classy designs, innovative features, excellent prices and flat performance. in less than four years, they became the top selling mobile phone brand in bangladesh with millions of fans and users all around the country. the primary reason behind their huge success is the affordable price combined with decent build quality, trusted service and useful features. market research is pointing out that the primary focus of symphony is the android mobile fans with 3,000 to 15,000 tk budget.

user
In that passage, there are eighteen occurrences of the letter "d."
assistant