void insert(Dictionary D, char* k, char* v){
    int hashNum;
    char* hashValue;
    Node prev, N, temp;

    if(D == NULL){
        fprintf(stderr,"Dictionary Error: calling insert() on NULL Dictionary reference\n");
        exit(EXIT_FAILURE);
    }
    hashNum = hash(k); //gets the index where k is

    hashValue = lookup(D, k); //returns key you were looking for after looking it up to check if it's there
    if (hashValue == NULL) {
        N = newNode(k, v);
        if (D->hashTable[hashNum] == NULL) {
            D->hashTable[hashNum] = N;
        } else {
            N->next = D->hashTable[hashNum];
            D->hashTable[hashNum] = N;
        }
    } else {
        N = D->hashTable[hashNum];
        while (N != NULL) {
            if (strcmp(N->key, k) == 0) {
                N->value = v;
                break;
            }
            N = N->next;
        }
    }