--- a/progs/catastrophic/catastrophic.py	Tue Sep 01 16:00:37 2020 +0100
+++ b/progs/catastrophic/catastrophic.py	Wed Sep 02 23:34:19 2020 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import re
 import sys
@@ -19,5 +19,5 @@
 s = ("a" * int(cn))
 m = re.match('(a*)*b' , s) 
 
-print s
-print m
+print(s)
+print(m)