diff --git a/cv4/a_train.c b/cv4/a_train.c
index db20e3a..cbd4b57 100755
--- a/cv4/a_train.c
+++ b/cv4/a_train.c
@@ -43,6 +43,14 @@ struct car* clear_train(struct car* first, const char* target) {
 	if (this == NULL){
 		return NULL;
 	}
+	if (this->next == NULL){
+		if(strcmp(this->value, target) == 0){
+			free(this);
+			return NULL;
+		}else {
+			return first;
+		}
+	}
 	while( this->next->next != NULL){
 		if(strcmp(this->value, target) == 0){
 			this->next == this->next->next;