--- /dev/null
+][[]][ is not well-balanced
+[[]][] is well-balanced
+[]][][ is not well-balanced
+[[[]]] is well-balanced
+[][]][ is not well-balanced
+]][[][ is not well-balanced
+[]]][[ is not well-balanced
+[]][][ is not well-balanced
+[][][] is well-balanced
+][]][[ is not well-balanced