it should be begin to end

alib2algo/src/stringology/transform/BeginToEndIndex.h

@@ -38,7 +38,7 @@ ext::set < unsigned > BeginToEndIndex::transform ( const string::LinearString <
 	ext::set < unsigned > res;
 	for ( unsigned index : indexes )
-		res.insert ( index - pattern.getContent ( ).size ( ) );
+		res.insert ( index + pattern.getContent ( ).size ( ) );
 	return res;
 }