E. Cheese Board
Not to be confused with chessboard.
The first line of input contains a single integer N (1 ≤ N ≤ 100) — the number of cheeses you have.The next N lines describe the cheeses you have. Each line contains two space-separated strings: the name of the cheese and its type. The name is a string of lowercase English letters between 1 and 10 characters long. The type is either ""soft"" or ""hard. All cheese names are distinct.
Output a single number.