diff --git a/libs/base/levenshtein_dfa.cpp b/libs/base/levenshtein_dfa.cpp
index eeeea960a..89005ea4e 100644
--- a/libs/base/levenshtein_dfa.cpp
+++ b/libs/base/levenshtein_dfa.cpp
@@ -21,7 +21,7 @@ size_t AbsDiff(size_t a, size_t b)
 class TransitionTable
 {
 public:
-  TransitionTable(UniString const & s, std::vector<UniString> const & prefixMisprints, size_t prefixSize)
+  TransitionTable(UniString const & s, std::array<UniString, 11> const & prefixMisprints, size_t prefixSize)
     : m_s(s)
     , m_size(s.size())
     , m_prefixMisprints(prefixMisprints)
@@ -108,7 +108,7 @@ private:
 
   UniString const & m_s;
   size_t const m_size;
-  std::vector<UniString> const m_prefixMisprints;
+  std::array<UniString, 11> const m_prefixMisprints;
   size_t const m_prefixSize;
 };
 }  // namespace
@@ -190,7 +190,7 @@ void LevenshteinDFA::State::Normalize()
 
 // LevenshteinDFA ----------------------------------------------------------------------------------
 // static
-LevenshteinDFA::LevenshteinDFA(UniString const & s, size_t prefixSize, std::vector<UniString> const & prefixMisprints,
+LevenshteinDFA::LevenshteinDFA(UniString const & s, size_t prefixSize, std::array<UniString, 11> const & prefixMisprints,
                                size_t maxErrors)
   : m_size(s.size())
   , m_maxErrors(maxErrors)
diff --git a/libs/base/levenshtein_dfa.hpp b/libs/base/levenshtein_dfa.hpp
index 5c7329928..5af19fe2e 100644
--- a/libs/base/levenshtein_dfa.hpp
+++ b/libs/base/levenshtein_dfa.hpp
@@ -98,7 +98,7 @@ public:
   LevenshteinDFA(LevenshteinDFA &&) = default;
   LevenshteinDFA & operator=(LevenshteinDFA &&) = default;
 
-  LevenshteinDFA(UniString const & s, size_t prefixSize, std::vector<UniString> const & prefixMisprints,
+  LevenshteinDFA(UniString const & s, size_t prefixSize, std::array<UniString, 11> const & prefixMisprints,
                  size_t maxErrors);
   LevenshteinDFA(std::string const & s, size_t prefixSize, size_t maxErrors);
   LevenshteinDFA(UniString const & s, size_t maxErrors);
diff --git a/libs/indexer/search_string_utils.cpp b/libs/indexer/search_string_utils.cpp
index 64d5bfabf..5822c4228 100644
--- a/libs/indexer/search_string_utils.cpp
+++ b/libs/indexer/search_string_utils.cpp
@@ -21,7 +21,7 @@ using namespace strings;
 
 namespace
 {
-std::vector<UniString> const kAllowedMisprints = {
+std::array<UniString, 11> const kAllowedMisprints = {
     MakeUniString("ckq"), MakeUniString("eyjiu"), MakeUniString("gh"), MakeUniString("pf"), MakeUniString("vw"),
 
     // Russian
@@ -118,11 +118,12 @@ static std::pair<UniString, UniString> const kPreprocessReplacements[] = {
     {MakeUniString("ι.ν"), MakeUniString("ιερός ναός")},
     {MakeUniString("κων/νου"), MakeUniString("κωνσταντίνου")},
     {MakeUniString("д-р"), MakeUniString("доктор")},
-    {MakeUniString("ж.к"), MakeUniString("жилищен комплекс")},
+    {MakeUniString("ж.к."), MakeUniString("жилищен комплекс")},
     {MakeUniString("м-н"), MakeUniString("микрорайон")},
     {MakeUniString("наб-я"), MakeUniString("набережная")},
     {MakeUniString("пр-д"), MakeUniString("проезд")},
     {MakeUniString("пр-т"), MakeUniString("проспект")},
+    {MakeUniString("আ/এ"), MakeUniString("আবাসিক এলাকা")},
 };
 
 void TransliterateHiraganaToKatakana(UniString & s)
diff --git a/libs/search/query_params.cpp b/libs/search/query_params.cpp
index 25f3b5e9a..96e25791d 100644
--- a/libs/search/query_params.cpp
+++ b/libs/search/query_params.cpp
@@ -55,7 +55,7 @@ unordered_map<string, vector<string>> const kSynonyms = {
     {"accs", {"access"}},
     {"aceq", {"acequia"}},
     {"ach", {"ancien chemin"}},
-    {"a.d", {"auf der", "an der"}},
+    //{"a.d", {"auf der", "an der"}}, // unreachable
     {"adi", {"ambodi"}},
     {"adm", {"admirała", "admirał"}},
     {"afb", {"air force base"}},
@@ -901,7 +901,7 @@ unordered_map<string, vector<string>> const kSynonyms = {
     {"prk", {"purok"}},
     {"prm", {"promenade"}},
     {"profª", {"professora"}},
-    {"prof", {"professora", "professor", "profesora", "profesorky", "profesora (profesor)"}},
+    {"prof", {"professora", "professor", "profesora", "profesorky", "profesor"}},
     {"proj", {"projectada", "projetada"}},
     {"prolng", {"prolongamento"}},
     {"prol", {"prolongación"}},
@@ -1359,7 +1359,6 @@ unordered_map<string, vector<string>> const kSynonyms = {
     {"туп", {"тупик", "тупік"}},
     {"ул", {"улица"}},
     {"ш", {"шаша", "шосе", "шоссе"}},
-    {"আ/এ", {"আবাসিক এলাকা"}},
     {"ইউপি", {"ইউনিয়ন পরিষদ"}},
     {"একনেক", {"জাতীয় অর্থনৈতিক পরিষদের নির্বাহী কমিটি"}},
     {"টেশিস", {"টেলিফোন শিল্প সংস্থা"}},