Write a python function, find_ten_substring(num_str) which accepts a string and returns the list of 10-substrings of that string. Handle the possible errors in the code written inside the function.

# You are given a string, S, and a list of words, L, that are all of the same length. # Find all starting indices of substring(s) in S that is a concatenation of each word # in L exactly once and ...