diff --git a/src/parser.c b/src/parser.c
index fffa720..30beed9 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -28,6 +28,31 @@ struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement) {
 	return syntaxelement->next;
 }
 
+void se_clean(struct SyntaxElement* syntaxtree) {
+	if (syntaxtree->next != NULL) {
+		switch (syntaxtree->next->type) {
+			case NONE:
+				free(syntaxtree->next);
+				syntaxtree->next = NULL;
+				break;
+			default:
+				se_clean(syntaxtree->next);
+				break;
+		}
+	}
+	if (syntaxtree->content != NULL && (syntaxtree->type == TOPTREE || syntaxtree->type == TREE)) {
+		switch (((struct SyntaxElement*)syntaxtree->content)->type) {
+			case NONE:
+				free(syntaxtree->content);
+				syntaxtree->content = NULL;
+				break;
+			default:
+				se_clean((struct SyntaxElement*)syntaxtree->content);
+				break;
+		}
+	}
+}
+
 struct SyntaxElement* parse(FILE* file) {
 	struct SyntaxElement* syntaxtree = se_init();
 	struct SyntaxElement* syntaxtreestart = syntaxtree;
@@ -59,6 +84,7 @@ struct SyntaxElement* parse(FILE* file) {
 				syntaxtree->content = sstring;
 				es_free(string);
 				string = NULL;
+				syntaxtree = se_next(syntaxtree);
 			} else {
 				if (string == NULL) {
 					string = malloc(sizeof(struct Extstring));
@@ -77,10 +103,11 @@ struct SyntaxElement* parse(FILE* file) {
 				syntaxtree->content = sstring;
 				es_free(token);
 				token = NULL;
+				syntaxtree = se_next(syntaxtree);
 			} else {
 				es_addsymbol(token, symbol);
+				continue;
 			}
-			continue;
 		}
 		if (isspace(symbol)) 
 			continue;
@@ -88,7 +115,6 @@ struct SyntaxElement* parse(FILE* file) {
 			switch (symbol) {
 				case '(':
 					syntaxtree = se_bottom(syntaxtree);
-					syntaxtree->type = TREE;
 					break;
 				case ')':
 					if (syntaxtree->top->type == TOPTREE) {
@@ -148,5 +174,6 @@ struct SyntaxElement* parse(FILE* file) {
 		}
 		syntaxtree = syntaxtree->next;
 	}
+	se_clean(syntaxtreestart);
 	return syntaxtreestart;
 }