$9\mathrm{.}17\mathrm{.}12$: Find the positions of strings in an array list of strings.

$597714\mathrm{.}2988516.$qx$3$zqy$7$

Find the positions of all strings equal to a given string in an array list of strings. Adapt the algorithm from "Linear Search" in the "Common Array Algorithms" section. Instead of stopping at the first match, collect all positions. Complete the following code.