r"^@?(pop|popcorn)[\W_]*thank(s)?[\W_]*(you|u|q)?": welcome,
r"^@?(pop|popcorn)[\W_]*(hell[ou]+|hi)": greet_back,
r"^@?(pop|popcorn)[\W_]*antifreeze":anti_freeze,
r"^@?pop(corn)?[\W_]*stop[\W_]*antifreeze":stop_anti_freeze,
r"^@?pop(corn)?[\W_]*copy": copy_,