private static LinkedList<String> tryProxies(LinkedList<String> inputProxies) throws IOException {
    LinkedList<String> workingProxies = new LinkedList<String>();
    
    for(String currentProxy : inputProxies) {
        String tmp[] = currentProxy.split(":");
        try {
            if(connect(tmp[0], Integer.parseInt(tmp[1]))) {
                workingProxies.add(currentProxy);
            }
        }
        catch (Exception e) {}
    }
    
    return workingProxies;
}