Sister MengMeng wants you to leave at once. Add different punctuation marks to this sentence to make them express different meanings.

MengMeng, sister told you to go! -talking to MengMeng, my sister is a third party outside the conversation.

Sister MengMeng, I told you to go! -talking to MengMeng's sister (the speaker calls her sister Meng Meng). Sister is a third party outside the dialogue.

Sister MengMeng, I told you to go! -the speaker called elder sister, spoke to MengMeng. There is another third party.

Sister MengMeng wants you, go! -talking to someone, MengMeng's sister is a third party outside the conversation.

Sister MengMeng shouted, "Go quickly!" -Sister MengMeng is the keynote speaker.