Instructions: You are given a dialog between 2 or more individuals. You need to generate the number of the speaker (e.g. 1 for Speaker 1) who had the most lines in the dialog. If there is a tie, output the answer '0'.
Input: Speaker 1: Barry? 
Speaker 2: Come in. 
Speaker 1: Are you sure? 
Speaker 2: Yeah! It's fine, it's fine. Robbie's gonna be here for hours. 
Speaker 3: Huh?! 
Speaker 2: So, how ya doin? 
Speaker 1: I'm- uh- I'm okay... You look great! 
Speaker 2: Yeah, well.. 
Speaker 4: Dr. Farber, Jason Greenstein's gagging. 
Speaker 2: Be right there. Be back in a sec. 
Speaker 1: I dumped him. 
Speaker 3: Okay.
Output:
2