def findDate(filename):

    with open(filename, 'r', encoding="utf-8") as file:
        line_number = 1
        for line in file:
            if len(line) >= 7:
                for i in range(len(line) - 6):
                    if line[i] == '1' and line[i+1] == '9':
                        char3 = line[i + 2] in ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
                        char4 = line[i + 3] in ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
                        if char3 and char4:
                            if line[i+4] == ' ' and line[i+5] == 'r' and line[i+6] == '.':
                                print(f"Line {line_number}")
                            break
            line_number += 1

findDate('TaskA03/simple.in')