関連ワード:  python find all permutations of a list    python find all permutations of a string    python find all permutations    python get all permutations    python get all permutations of length n    python get all permutations of multiple lists    python get all permutations of two lists    python get all permutations of a set    python get all permutations of array    python program to find all permutations of a string