class TextDocument:
    def __init__(self):
        self.textLines = []

    def get_text_lines(self):
        return self.textLines

class TextEditor:
    def __init__(self):
        self.currentDocument = TextDocument()

    def add_text(self, line):
        self.currentDocument.textLines.append(line)

    def remove_text(self, line_index):
        if line_index < len(self.currentDocument.textLines):
            self.currentDocument.textLines.pop(line_index)

    def display_document(self):
        for line in self.currentDocument.get_text_lines():
            print(line)