docs: def start(st_reg_number):
      """Checks the number valiaty for the Acre state"""
  
      #st_reg_number = str(st_reg_number)
      weights = [4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2]
      digits = st_reg_number[:len(st_reg_number) - 2]
      check_digits = st_reg_number[-2:]
      divisor = 11
  
      if len(st_reg_number) > 13:
          return False
  
      sum_total = 0
      for i in range(len(digits)):
          sum_total = sum_total + int(digits[i]) * weights[i]
  
      rest_division = sum_total % divisor
      first_digit = divisor - rest_division
  
      if first_digit == 10 or first_digit == 11:
          first_digit = 0
  
      if str(first_digit) != check_digits[0]:
          return False
  
      digits = digits + str(first_digit)
      weights = [5] + weights
  
      sum_total = 0
      for i in range(len(digits)):
          sum_total = sum_total + int(digits[i]) * weights[i]
  
      rest_division = sum_total % divisor
      second_digit = divisor - rest_division
  
      if second_digit == 10 or second_digit == 11:
          second_digit = 0
  
      return str(first_digit) + str(second_digit) == check_digits