diff --git a/alib2algo/src/stringology/transform/BeginToEndIndex.cpp b/alib2algo/src/stringology/transform/BeginToEndIndex.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..15a199ebcb97cf4f0b3f201bd9ca1d652a369325
--- /dev/null
+++ b/alib2algo/src/stringology/transform/BeginToEndIndex.cpp
@@ -0,0 +1,20 @@
+/*
+ * BeginToEndIndex.cpp
+ *
+ *  Created on: 5. 11. 2014
+ *      Author: Jan Travnicek
+ */
+
+#include "BeginToEndIndex.h"
+#include <registration/AlgoRegistration.hpp>
+
+namespace {
+
+auto BeginToEndIndexLinearString = registration::AbstractRegister < stringology::transform::BeginToEndIndex, ext::set < unsigned >, const string::LinearString < > &, const ext::set < unsigned > & > ( stringology::transform::BeginToEndIndex::transform, "pattern", "indexes" ).setDocumentation (
+"Transforms a set of occurrences represented by end indexes to set of occurrences representing by start indexes.\n\
+\n\
+@param pattern the pattern that was being searched for\n\
+@param indexes the original occurrences\n\
+@return the set of transformed occurences" );
+
+} /* namespace */
diff --git a/alib2algo/src/stringology/transform/BeginToEndIndex.h b/alib2algo/src/stringology/transform/BeginToEndIndex.h
new file mode 100644
index 0000000000000000000000000000000000000000..b064e46ddc230803a89bd14a0126e25f2668615b
--- /dev/null
+++ b/alib2algo/src/stringology/transform/BeginToEndIndex.h
@@ -0,0 +1,50 @@
+/*
+ * BeginToEndIndex.h
+ *
+ *  Created on: 5. 11. 2014
+ *      Author: Jan Travnicek
+ */
+
+#ifndef _STRINGOLOGY_BEGIN_TO_END_INDEX_H_
+#define _STRINGOLOGY_BEGIN_TO_END_INDEX_H_
+
+#include <alib/set>
+
+#include <string/LinearString.h>
+
+namespace stringology {
+
+namespace transform {
+
+/**
+ */
+class BeginToEndIndex {
+public:
+	/**
+	 * Transforms a set of occurrences represented by end indexes to set of occurrences representing by start indexes.
+	 *
+	 * \tparam SymbolType the type of symbols in the string
+	 *
+	 * \param pattern the pattern that was being searched for
+	 * \param indexes the original occurrences
+	 * \return the set of transformed occurences
+	 */
+	template < class SymbolType >
+	static ext::set < unsigned > transform ( const string::LinearString < SymbolType > & pattern, const ext::set < unsigned > & indexes );
+};
+
+template < class SymbolType >
+ext::set < unsigned > BeginToEndIndex::transform ( const string::LinearString < SymbolType > & pattern, const ext::set < unsigned > & indexes ) {
+	ext::set < unsigned > res;
+
+	for ( unsigned index : indexes )
+		res.insert ( index - pattern.getContent ( ).size ( ) );
+
+	return res;
+}
+
+} /* namespace transform */
+
+} /* namespace stringology */
+
+#endif /* _STRINGOLOGY_BEGIN_TO_END_INDEX_H_ */