Please deduce the correct password based on the following 4 known conditions:
A certain combination lock consists of two numbers and two letters, with neither the numbers nor the letters repeating.
1. Guess: 64RY, Feedback: both numbers are incorrect; both letters are incorrect.
2. Guess: 51MB, Feedback: both numbers are incorrect; both letters are incorrect.
3. Guess: 29PV, Feedback: both numbers are incorrect; both letters are incorrect.
4. Guess: 71EW, Feedback: one number is correct but in the wrong position; one number is incorrect and incorrect; both letters are correct but in the wrong positions.
Please provide your answer in the format <<< ["X", "Y", "Z", "W"] >>> where X and Y are the numbers and Z and W are the letters of the password.
