simple Data Structure in Java

can anyone help with this question?

. [5 marks] Read the input one line at a time and output the current line if and only if it is not a suffix of some previous line. For example, if the some line is "Oxdeadbeef" and some subsequent line is "beef", then the subsequent line should not be output. public static void dolt (BufferedReader r, Printwriter w) throws IOException /Your code goes here - see Parte for an example