diff --git a/ReportTruncate-Robinson.cpp b/ReportTruncate-Robinson.cpp
index 64eeec4..9119635 100644
--- a/ReportTruncate-Robinson.cpp
+++ b/ReportTruncate-Robinson.cpp
@@ -4,6 +4,7 @@
 #include <vector>
 #include <regex>
 #include <algorithm>
+#include <cctype>
 
 static const std::regex number_regex_full(R"(\d+)");
 static const std::regex number_regex_1to3(R"(\b\d{1,3}\b)");
@@ -63,8 +64,11 @@ int main(int argc, char* argv[]) {
     bool has_bbgyro = false;
     bool has_subs = false;
     for (const auto& l : lines) {
-        if (!has_bbgyro && l.find("BBGYRS") != std::string::npos) has_bbgyro = true;
-        if (!has_subs && l.find("SUBS") != std::string::npos) has_subs = true;
+        std::string lower = l;
+        std::transform(lower.begin(), lower.end(), lower.begin(),
+            [](unsigned char c) { return std::tolower(c); });
+        if (!has_bbgyro && lower.find("bbgyrs") != std::string::npos) has_bbgyro = true;
+        if (!has_subs && lower.find("subs") != std::string::npos) has_subs = true;
         if (has_bbgyro || has_subs) break;
     }
 
@@ -139,7 +143,10 @@ int main(int argc, char* argv[]) {
         int subs_count = 0;
         size_t subs_index = std::string::npos;
         for (size_t i = 0; i < lines.size(); ++i) {
-            if (lines[i].find("SUBS") != std::string::npos) {
+            std::string lower = lines[i];
+            std::transform(lower.begin(), lower.end(), lower.begin(),
+                [](unsigned char c) { return std::tolower(c); });
+            if (lower.find("subs") != std::string::npos) {
                 subs_count++;
                 if (subs_count == 2) {
                     subs_index = i;