How to write a button bot in Telegram in Python?

Question

Python

I understand how to set button options and enable the bot, but the next steps after using the last button are not clear.

block diagram

the code

import telebot

bot = telebot.TeleBot('мой токен')
keyboard1 = telebot.types.ReplyKeyboardMarkup(True, True)
keyboard2 = telebot.types.ReplyKeyboardMarkup(True, True)
keyboard1.row('А','Б')
keyboard2.row('1,'2')

@bot.message_handler(commands=['start'])
def start_message(message):
    bot.send_message(message.chat.id, 'Привет. А или Б?',reply_markup=keyboard1)

@bot.message_handler(content_types=['text'])
def send_text(message):
    if message.text.lower() == 'А':
        bot.send_message(message.chat.id, '1 или 2?', reply_markup=keyboard2)
    elif message.text.lower() == 'Б':
        bot.send_message(message.chat.id, '1 или 2?',reply_markup=keyboard2)
        bot.register_next_step_handler(message,data);

??

bot.polling()

Answer 1

Alternatively
if message.text == 'A':
bot.register_next_step_hendler(message, function1)
elif message.text == 'B':
bot.register_next_step_hendler(message, function2 )
Etc
converts the string to lowercase, and then compares it to an uppercase letter.
Doing so is not good.