print("Type 'q' to quit")

while True:

    filename = input("Enter file name: ")
    if filename == 'q':
        break
    else:
        try:
            with open(filename, encoding="utf8") as f:
                contents = f.read()

        except FileNotFoundError:
            print("File not found.")

        else:
            while True:
                word = input("Enter the word you want to count: ")
                word_count = contents.lower().count(word.lower())
                if word == 'q':
                    raise SystemExit
                else:
                    with open(filename, encoding="utf8") as f:
                        contents = f.read()
                        word_count = contents.lower().count(word.lower())

                    print("The word '" + word.lower() + "' appears " +
                          str(word_count) + " times on this file.\n")

                    print("Type 'c' to change the file or 'a' to search " +
                          "for another word")

                    command = input("Input the command: ")
                    print()
                    if command == 'c':
                        break
                    elif command == 'a':
                        continue
                    elif command == 'q':
                        raise SystemExit