diff --git a/index.mdwn b/index.mdwn
index ae8cc0e..636804c 100644
--- a/index.mdwn
+++ b/index.mdwn
@@ -28,7 +28,7 @@ Anyone can contribute. To add your suggestions:
 ### Terrasse lecture room
 - The 4 tree trunks in the middle that support the interior of the roof are too wide, so that students behind them have to contort themselves to see the entire blackboard. Replace them with thin metallic ones (the tree trunks that support the boundary of the roof around the room are nice).
 - The last 30 cm at the bottom of the blackboards are not visible to the students that are at the back of the room. Make the blackboard a bit higher.
-- The left extremity of the leftmost blackboard is not visible from places that are on front right position (and conversely). Rotate the blackboards at the extremities a bit so that their content can be seen from everywhere in the room.
+- The left extremity of the leftmost blackboard is not visible from places that are on front right position (and conversely). Rotate the blackboards at the extremities a bit so that their content can be seen from everywhere in the room (alltogether, the blackboards could form a U, not a straight line).