diff --git a/algorithm.py b/algorithm.py
index f347477..d17819d 100644
--- a/algorithm.py
+++ b/algorithm.py
@@ -133,11 +133,11 @@ class NearestNeighborsSweep(Algorithm):
             for i, pnt in enumerate(self._input):
                 if i:
                     result_string += ","
-                result_string += pnt.str()
+                result_string += str(pnt)
             result_string += "]\n"
             result_string += "    Nearest Neighbors: "
-            result_string += linesegment.LineSegment(self._result["points"][0], \
-                self._result["points"][1]).str()
+            result_string += str(linesegment.LineSegment(self._result["points"][0], \
+                self._result["points"][1]))
             result_string += "\n"
             result_string += "    Distance: " + str(self._result["distance"]) + "\n"
             result_string += "    Number of steps:\n"