diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46f719a..d213726 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(COSC-4P80-Assignment-1 VERSION 0.0.11)
+project(COSC-4P80-Assignment-1 VERSION 0.0.12)
 
 option(ENABLE_ADDRSAN "Enable the address sanitizer" OFF)
 option(ENABLE_UBSAN "Enable the ub sanitizer" OFF)
diff --git a/lib/blt b/lib/blt
index 7935e34..a7412fc 160000
--- a/lib/blt
+++ b/lib/blt
@@ -1 +1 @@
-Subproject commit 7935e34ad4ee751f25c7664aa3b5d257f79135fe
+Subproject commit a7412fccec0ba14e1a4f0135e53db002cb944924
diff --git a/src/main.cpp b/src/main.cpp
index 261ba09..8f0ca89 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -131,11 +131,28 @@ int main()
         BLT_TRACE_STREAM << index << " : " << value.vec_from_column_row() << '\n';
     
     BLT_TRACE("");
+
+//    for (const auto& [index, value] : blt::enumerate(part_a_inputs).rev())
+//        BLT_TRACE_STREAM << index << " : " << value.vec_from_column_row() << '\n';
     
-    for (const auto& [index, value] : blt::enumerate(part_a_inputs).rev())
-        BLT_TRACE_STREAM << index << " : " << value.vec_from_column_row() << '\n';
-    
-//    BLT_TRACE(blt::type_string<decltype(blt::enumerate(part_a_inputs))::type>());
+    BLT_TRACE("");
+
+    BLT_TRACE_STREAM
+            << blt::meta::is_random_access_iterator<decltype(part_a_inputs.begin())>
+            << '\n';
+
+    BLT_TRACE_STREAM
+            << blt::meta::is_bidirectional_iterator<decltype(part_a_inputs.begin())>
+            << '\n';
+
+    BLT_TRACE_STREAM
+            << blt::meta::is_bidirectional_or_better<decltype(part_a_inputs.begin())>
+            << '\n';
+
+//    auto d = blt::enumerate(part_a_inputs).rev();
+//    BLT_TRACE(blt::type_string<decltype(d.begin())>());
+//    BLT_TRACE(blt::type_string<decltype(*++d.begin())>());
+
 //    BLT_TRACE(blt::type_string<std::iterator_traits<decltype(blt::enumerate(part_a_inputs))::type>::iterator_category>());
 //    BLT_TRACE(blt::type_string<decltype(blt::enumerate(part_a_inputs))::iter>());
 //    BLT_TRACE(blt::type_string<decltype(std::reverse_iterator{part_a_inputs.begin()})::iterator_category>());