如何获取具有字母表的字符串的字典顺序

def get_lexicographic_strings(alphabet):
    strings = []
    length = 1

    while True:
        current_string = ['a'] * length

        while True:
            # Convert current_string to string and add to the list
            strings.append(''.join(current_string))

            # Increment the last character
            current_string[-1] = chr(ord(current_string[-1]) + 1)

            # Check if the last character exceeds the alphabet
            if current_string[-1] > alphabet[-1]:
                # Find the first character that can be incremented
                for i in range(length - 2, -1, -1):
                    if current_string[i] < alphabet[-1]:
                        # Increment the character and reset the following characters
                        current_string[i] = chr(ord(current_string[i]) + 1)
                        for j in range(i + 1, length):
                            current_string[j] = alphabet[0]
                        break
                else:
                    # All characters have been incremented, exit the loop
                    break

        length += 1

    return strings

alphabet = 'abcdefghijklmnopqrstuvwxyz'
strings = get_lexicographic_strings(alphabet)
print(strings)