size_t k = atoi(argv[2]);
    char* cadena = argv[1];
    size_t n = 0;
    char* cadena_aux;
    aux = 0;
    cola_t* cola = cola_crear();
    char* buffer = NULL;
    while(getline(&buffer,&n,archivo) > 0){
        if (strstr(buffer,cadena) != NULL){
            if (k == 0) printf("%s\n",buffer );
            else if (k > 0){
                while (!cola_esta_vacia(cola)){
                    cadena_aux = (char*)cola_desencolar(cola);
                    printf("%s\n",cadena_aux );
                    free(cadena_aux);
                    aux--;
                }
                printf("%s\n",buffer );
            }
        }
        else{
            if (k == aux){
                cadena_aux = (char*)cola_desencolar(cola);
                free(cadena_aux);
            }
            if (k > 0){
                cola_encolar(cola, (void*)buffer);
                aux++;
            }
        }
        //free(buffer);
    }