How to increment and store the value of a variable each time a button is pressed on a python telegram bot

Question

Here is my code. Any time I run the code and press a button, it just increments once. For example if press team_1 button it will increment to 11 and keep on printing 11 but I want to increment the variable anytime the button is pressed add and not just one time

from aiogram import Bot, Dispatcher, executor, types
from aiogram.types import InlineKeyboardMarkup, InlineKeyboardButton


button1 = InlineKeyboardButton(text= "Team 1", callback_data="team_1")
button2 = InlineKeyboardButton(text= "Team 2", callback_data="team_2")
keyboard_inline = InlineKeyboardMarkup().add(button1, button2)

bot = Bot(token='5603608851:AAH5VWjUoK-x_K3LScnIG6rbe87oBblHdrs')
dp = Dispatcher(bot)


@dp.message_handler(commands=['bet'])
async def option(message: types.Message):
    await message.reply("Select a team:", reply_markup=keyboard_inline)


@dp.message_handler(commands=['start'])
async def welcome(message: types.Message):
    await message.reply("Hello! Im Lele bot, Please follow the instruction")

#handler for clicking the buttom objects
@dp.callback_query_handler(text = ["team_1", "team_2"])
async def choice(call: types.CallbackQuery):
    a = 1
    b= 1
    if call.data == "team_1":
        b += 10
        await call.message.answer(b)
    if call.data == "team_2":
        a += 1
        await call.message.answer(a)
    await call.answer()


executor.start_polling(dp)

Answer 1

A little time and manipulations with global variables and the following option is ready:

from aiogram import Bot, Dispatcher, executor, types

keyboard_inline = types.InlineKeyboardMarkup()
button1 = types.InlineKeyboardButton(text="Team 1", callback_data="team_1")
button2 = types.InlineKeyboardButton(text="Team 2", callback_data="team_2")
button3 = types.InlineKeyboardButton(text="result", callback_data="result")
keyboard_inline.add(button1, button2)
keyboard_inline.add(button3)


bot = Bot(token='token')
dp = Dispatcher(bot)


@dp.message_handler(commands=['start'])
async def welcome(message: types.Message):
    await message.reply("Hello! Im Lele bot, Please follow the instruction")


@dp.message_handler(commands=['bet'])
async def option(message):
    global a, b
    a = 0
    b = 0
    await message.reply("Select a team:", reply_markup=keyboard_inline)
    await bot.send_message(message.chat.id, "Team 1 - " + str(a) + " score\nTeam 2 - " + str(b) +" score")


@dp.callback_query_handler(lambda call: True)
async def choice(call: types.CallbackQuery):
    global a, b
    if call.data == "team_1":
        a += 1
        await bot.send_message(call.message.chat.id, "Team 1 - " + str(a) + " score\nTeam 2 - " + str(b) +" score")
    elif call.data == "team_2":
        b += 1
        await bot.send_message(call.message.chat.id, "Team 1 - " + str(a) + " score\nTeam 2 - " + str(b) +" score")
    elif call.data == "result":
        await bot.send_message(call.message.chat.id, "---FINAL SCORE---\n"
                                                     "Team 1 - " + str(a) + " score\nTeam 2 - " + str(b) + " score")
        a = b = 0
    await call.answer()


if __name__ == '__main__':
    executor.start_polling(dp, skip_updates=True)

I hope that programmers with experience do not throw stones at me;)