The first parameter represents a puzzle and the second represents a row number. Return the letters in the row corresponding to the rovw number, excluding the newline character. The first row is row number 0. For example, if our puzzle is the string 'abcd efghlnijkl ', and we wanted to find row 1 (which contains 4 letters), we would expect the string 'efgh' to be returned. get_row(str, int) ->str Hint: you will need to call on one of the helper functions provided in the starter code