I’m not alive but I have 5 fingers. What am I? (Whoever gets it right I will mark him or her brainiest and will give him 77 point good luck btw this is a riddle which has two answers be careful)

These two sentences have one difference: one has a comma. think about what each sentence means. 1. let's eat, grandma. 2. let's eat grandma. what does the first sentence mean? what does the second sentence mean?