fixes 3 pairs подряд, etc

coord.py

@@ -1,3 +1,4 @@
+# Copyright Stanislav Mironov
 
 
 class Coord:
@@ -13,6 +14,10 @@ class Coord:
         return Coord(self.row if row is None else row,
                      self.col if col is None else col)
     
+    def copy(self) -> "Coord":
+        return Coord(self.row,
+                     self.col)
+    
     def cell(self, reader: "ExcelSheetReader") -> "TranschendentnostCell":
         return reader.cell(self.row, self.col)