# # Second attempt

    # instructions = ""

    # with open(input_f) as file:
    #     for line in file:
    #         instructions += line
    # print(instructions)


# #(do\(\).*?mul\((\d+),{1}(\d+)\))



# (?<=do\(\))([^d]*(mul\(\d+,\d+\))[^d]*)+(?=don't\(\))
 
# (?<=do\(\))[^m]*(mul\((\d+),{1}(\d+)\)*)*[^d]*(?=don't\(\))