Typo.

diff --git a/data.py b/data.py
index 2134557..83dfea5 100644
--- a/data.py
+++ b/data.py
@@ -389,7 +389,7 @@ class Condition(object):
             l2 = line_by_two_points(c,d)
             return equation_perp(l1,l2)
         if self.kind == COND_IN:
-            a,b = self.y.A, self.y,B
+            a,b = self.y.A, self.y.B
             return equation_in(self.x, line_by_two_points(a,b))
         if self.kind == COND_EQ:
             if is_number(self.y):