String gib$\_$string is read from input. If $\text{'}$q$\text{'}$ is in gib$\_$string, then:

Output $\text{'}$At position: $\text{'}$ followed by the index of the last occurrence.

Create a string from gib$\_$string with the first three occurrences of $\text{'}$q$\text{'}$ replaced by $\text{'}4\text{'}$ and output gib$\_$string on a newline.

Otherwise, output $\text{'}$No matches'.