AT_abc471_b [ABC471B] Survey Tabulation

Takahashi is tallying the results of a survey. $ N $ people answered the survey, and the $ i $ -th person's answer is a string $ S_i $ consisting of English letters. Find the maximum number of people who gave the same answer in this survey. Here, the case of the letters in the answers is not distinguished. For example, `AtCoder`, `ATCODER`, and `atcoder` are all considered the same answer.

The input is given from Standard Input in the following format: > $ N $ $ S_1 $ $ \vdots $ $ S_N $

Output the answer.

### Sample Explanation 1 There are three answers that are the same as `ABC`, and this number is the maximum. ### Constraints - $ 1 \leq N \leq 100 $ - $ S_i $ is a string of length between $ 1 $ and $ 10 $ (inclusive) consisting of uppercase and lowercase English letters. - $ N $ is an integer.