E.g. if you had 'Days of the Week,' and you thought there were Monday (T), Tuesday (C), Wednesday (P), and Friday (Q), you would enter TCPQ4 once you have entered the four.
Name all the things you think are in the category. When you have named as many as you think there are, enter the letters in brackets in order from top to bottom followed by the number of answers you have entered. Note: Do not put brackets around the letters in your answer.