1 files changed, 9 insertions, 0 deletions
diff --git a/progs/a473.py b/progs/a473.py
new file mode 100644
index 0000000..d82695d
--- /dev/null
+++ b/progs/a473.py
@@ -0,0 +1,9 @@
+def extract_missing(test_list, strt_val, stop_val):
+  res = []
+  for sub in test_list:
+    if sub[0] > strt_val:
+      res.append((strt_val, sub[0]))
+      strt_val = sub[1]
+    if strt_val < stop_val:
+      res.append((strt_val, stop_val))
+  return (res) 
+\ No newline at end of file