diff --git a/cv6/a_station.c b/cv6/a_station.c
deleted file mode 100644
index 92805fb..0000000
--- a/cv6/a_station.c
+++ /dev/null
@@ -1,149 +0,0 @@
-#include "a_station.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-int getLength(struct car* first) {
-
-	if (first != NULL) {
-
-		int count = 1;
-
-		while (first->next != NULL) {
-
-			count++;
-			first = first->next;
-
-		}
-
-		return count;
-
-	} else {
-
-		return 0;
-
-	}
-
-}
-
-struct car* getLast(struct car* first) {
-
-	if (first == NULL) return NULL;
-
-	while (first->next != NULL) first = first->next;
-
-	return first;
-
-}
-
-struct car* getLastButOne(struct car* first) {
-
-	if (first == NULL || first->next == NULL) return NULL;
-
-	while (first->next->next != NULL) first = first->next;
-
-	return first;
-
-}
-
-struct car* add_car(struct car* first, const char* target) {
-
-	struct car* newcar = calloc(1,sizeof(struct car));
-
-	strcpy(newcar->value, target);
-	newcar->next = NULL;
-
-	if (first == NULL) return newcar;
-
-	struct car* last = getLast(first);
-
-	last->next = newcar;
-
-	return first;
-
-}
-
-void print_train(struct car* first) {
-
-	if (first == NULL) return;
-
-	struct car* this = first;
-
-	printf("\nTrain way:\n\n");
-	printf("%s", this->value);
-
-	while (this->next != NULL) {
-
-		this = this->next;
-		printf(" -> ");
-		printf("%s", this->value);
-
-	}
-
-	printf("\n\n");
-
-}
-
-void popBack(struct car* first) {
-
-	if (first == NULL) { printf("123"); return; }
-
-	struct car* lastbo = getLastButOne(first);
-
-	if (lastbo == NULL) {
-		
-		free(first);
-		first = NULL;
-
-	} else {
-
-		free(lastbo->next);
-		lastbo->next = NULL;
-
-	}
-
-}
-
-void cancel_train(struct car* first) {
-
-	if (first == NULL) return;
-
-	while (first->next != NULL) popBack(first);
-
-	free(first);
-	first = NULL;
-
-}
-
-struct car* clear_train(struct car* first, const char* target) {
-
-	if (first == NULL) return NULL;
-
-	// while (first->next->next != NULL) {
-
-	// 	if (strcmp(first->next->value, target) == 0) {
-
-	// 		struct car* node = first->next->next;
-
-	// 		free(first->next);
-
-	// 		first->next = node;
-
-	// 	}
-
-	// }
-
-	struct car* this = first;
-
-	if (strcmp(first->value, target) == 0) {
-
-		this = this->next;
-
-		free(first);
-
-	}
-
-	return this;
-
-}
-