function getNode(llist, tailPos) {
    let curPos = llist

    while(curPos!= null){
        tailPos--
        curPos = curPos.next
    }
    
    tailPos = ((tailPos*-1) - 1)
    
    while(tailPos != 0){
        llist = llist.next
        tailPos--
    }
    return llist.data


}