Implement StringLog, adding the following methods

int howMany$($String element$)$;

Returns count of occurrences of element

boolean uniquelnsert$($String element$)$;

Inserts element and returns true if element not already present

String smallest$()$;

Returns "earliest" $($in alphabetical terms$)$ String

int removeAll$($String element$)$;

Removes all occurences of element and returns count