prompt list, accept ranges

src/tea3/cli.py

@@ -37,10 +37,33 @@ def prompt_list(prompt: str, item_name: str, min_value: int, max_value: int):
             print(f"Please enter at least one {item_name}.")
             continue
 
-        try:
-            values = [int(x) for x in raw.split()]
-        except ValueError:
-            print("Please enter only numbers separated by spaces.")
+        values = []
+        ok = True
+
+        for token in raw.split():
+            if "-" in token:
+                parts = token.split("-", 1)
+                if len(parts) != 2 or not parts[0].isdigit() or not parts[1].isdigit():
+                    ok = False
+                    break
+
+                start = int(parts[0])
+                end = int(parts[1])
+
+                if start > end:
+                    print(f"Invalid range '{token}': start must be <= end.")
+                    ok = False
+                    break
+
+                values.extend(range(start, end + 1))
+            else:
+                if not token.isdigit():
+                    ok = False
+                    break
+                values.append(int(token))
+
+        if not ok:
+            print("Please enter only numbers and ranges (like 3-7), separated by spaces.")
             continue
 
         if any(v < min_value or v > max_value for v in values):