class Node
    def _init_(self, message):
        self.message = message
        self.next = None

class ChatLog:
    def _init_(self):
        self.head = None
        self.tail = None

    def append(self, message):
        new_node = Node(message)
        if self.head is None:
            self.head = self.tail = new_node
        else:
            self.tail.next = new_node
            self.tail = new_node

    def display(self):
        current = self.head
        while current:
            print(current.message)
            current = current.next

def main():
    try:
        n = int(input().strip())
        if n < 1 or n > 1000:
            print("Invalid input")
            return

        chat_log = ChatLog()
        for _ in range(n):
            msg = input().strip()
            if any(ch.isdigit() for ch in msg) or " " in msg:
                print("Invalid input")
                return
            chat_log.append(msg)

        chat_log.display()

    except:
        print("Invalid input")

if _name_ == "_main_":
    main()