Finding possible permutation of N words [reviewed]
Problem Permutate a list of string this question is supposed to permutate the characters instead of the whole string, Here is input example {"red", "fox", "super" } the expected output is r fs, rfu, rfp, rfe, rfr, ros, rou, rop, roe, ror, rxs, rxu, rxp, rxe, rxr, efs, efu, efp, efe, efr, eos, eou, eop, eoe, eor, exs, exu, exp, exe, exr, dfs, dfu, dfp, dfe, dfr, dos, dou, dop, doe, dor, dxs, dxu, dxp, dxe, dxr