Given a list of arraylists containing elements, write a function that prints out the permutations of of the elements such that, each of the permutation set contains only 1 element from each arraylist and there are no duplicates in the list of permutation sets.

For example: consider the following lists

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Permuting Lists of Lists – Print all possible words from phone digits. Read the full post (499 words, estimated 2:0 mins reading time)