How to pick a combo lock.

combo_lock.py

# based on https://youtu.be/w4wkCcsWs4c

def guess_numbers(num1, num2):
  nums = [num1, num1+10, num1+20, num1+30,
          num2, num2+10, num2+20, num2+30]
  return nums

def main():
  print('''The first step is to find the "Sticky number"
by applying pressure to the shackle and turning clockwise 
until you hear/feel a click on one number. 
That is the sticky number:''')
  sticky_num = int(input('Sticky number: '))
  num1 = sticky_num + 5
  r = num1 % 4
  print('''Next you find two "guess numbers" between 0 and 11,
but pulling tight on the shackle on each number starting 
with 0 and finding the first two that stick on the number.''')
  guess_number1 = int(input('Guess number 1: '))
  guess_number2 = int(input('Guess number 2: '))
  guess_nums = guess_numbers(guess_number1, guess_number2)
  # print('Guess numbers:', guess_nums)
  #   
  number3_possibilities = []
  for num in guess_nums:
    if num % 4 == r:
      number3_possibilities.append(num)

  
  if len(number3_possibilities) != 2:
    print('This is not a possibility. ' +
      'You should start over and try again.')
    exit()

  print('''The guess numbers should reveal two
possible values for the third number. In turn, 
position the dial at each guess number, apply 
pressure to the shackle, and try to turn the 
dial. The number that is less stuck is the third number.''')
  print('Number 3 possibilities:', number3_possibilities)
  num3 = int(input('Number 3: '))

  number2_possibilities_temp = [
    r+2, r+10, r+18, r+26, r+34,
    r+6, r+14, r+22, r+30, r+38
  ]

  number2_possibilities = []
  for num in number2_possibilities_temp:
    if abs(num-num3) <= 2:
      continue
    elif num >= 40:
      number2_possibilities.append(num-40)
    else:
      number2_possibilities.append(num)

  number2_possibilities.sort()
  print('Number 2 possibilities:', number2_possibilities)

  print('POSSIBLE COMBINATIONS')
  for num in number2_possibilities:
    print('({},{},{})'.format(num1, num, num3))

  print('Try each of the above. Good luck!')

main()