List all the permutations of 2 letters chosen from W, X, Y. and Z. Macmillan Learning (Enter your answer using the capital letters as shown. For each permutation enter the letters side by side and in a comma- separated list. For example: ABAC,BC etc...) All permutations: List all the combinations of 2 letters chosen from W, X, Y, and Z. (Enter your answer using the capital letters as shown. For each combination enter the letters side by side and in a comma- separated list. For example: AB.AC,BC etc...) All combinations