1 files changed, 4 insertions, 0 deletions
diff --git a/progs/a853.py b/progs/a853.py
new file mode 100644
index 0000000..df558ce
--- /dev/null
+++ b/progs/a853.py
@@ -0,0 +1,4 @@
+def extract_symmetric(test_list):
+  temp = set(test_list) & {(b, a) for a, b in test_list}
+  res = {(a, b) for a, b in temp if a < b}
+  return (res) 
+\ No newline at end of file