fixed the while and begin..again loops conflicting

main.py

@@ -450,12 +450,12 @@ class Parser:
 			if lexeme == "next":
 				self._handle_next_control()
 				continue
-			if lexeme == "begin":
-				self._handle_begin_control()
-				continue
 			if lexeme == "while":
 				self._handle_while_control()
 				continue
+			if lexeme == "do":
+				self._handle_do_control()
+				continue
 			if lexeme == "repeat":
 				self._handle_repeat_control()
 				continue
@@ -732,13 +732,13 @@ class Parser:
 		entry = self._pop_control(("for",))
 		self._append_node(ForNext(loop_label=entry["loop"], end_label=entry["end"]))
 
-	def _handle_begin_control(self) -> None:
+	def _handle_while_control(self) -> None:
 		begin_label = self._new_label("begin")
 		end_label = self._new_label("end")
 		self._append_node(Label(name=begin_label))
 		self._push_control({"type": "begin", "begin": begin_label, "end": end_label})
 
-	def _handle_while_control(self) -> None:
+	def _handle_do_control(self) -> None:
 		entry = self._pop_control(("begin",))
 		self._append_node(BranchZero(target=entry["end"]))
 		self._push_control(entry)

while_test.sl

@@ -3,9 +3,9 @@ import stdlib/io.sl
 
 : main
     10
-    begin
-        dup 0 >
     while
+        dup 0 >
+    do
         dup puti cr
         1 -
     repeat