1 files changed, 41 insertions, 0 deletions
diff --git a/challenge-277/luca-ferrari/python/ch-1.py b/challenge-277/luca-ferrari/python/ch-1.py
new file mode 100644
index 0000000000..2634d9c077
--- /dev/null
+++ b/challenge-277/luca-ferrari/python/ch-1.py
@@ -0,0 +1,41 @@
+import sys
+
+# task implementation
+# the return value will be printed
+def task_1( args ):
+    words1 = []
+    words2 = []
+    first  = True
+    for w in args:
+        if w == '|':
+            first = False
+        if first:
+            words1.append( w )
+        else:
+            words2.append( w )
+
+    single1 = []
+    single2 = []
+    for w in words1:
+        if len( list( filter( lambda x: x == w, words1 ) ) ) == 1:
+            if not w in single1:
+                single1.append( w )
+
+    for w in words2:
+        if len( list( filter( lambda x: x == w, words2 ) ) ) == 1:
+            if not w in single2:
+                single2.append( w )
+
+    counting = 0
+    for w in single1:
+        if w in single2:
+            counting += 1
+
+    return counting
+
+
+# invoke the main without the command itself
+if __name__ == '__main__':
+    print( task_1( sys.argv[ 1: ] ) )
+
+