对原始数据进行清理和预处理，以便在分类模型中使用。数据集是一组Twitter帖子。
以下是一些Twitter帖子的示例：

"just bought a new car and I love it! #happycustomer #newcarfeeling"
"this traffic is horrible, why is it always so busy in the mornings? #commuterproblems"
"I can't believe how bad this restaurant's service is. I will never come back again. #worstservice #badfood"
"happy birthday to my best friend! #birthdaywishes #friendsforever"
The task is to clean and preprocess the raw data for use in a classification model. The dataset consists of a set of Twitter posts. Examples of Twitter posts are provided above.