1 files changed, 20 insertions, 0 deletions
diff --git a/challenge-264/zapwai/python/ch-1.py b/challenge-264/zapwai/python/ch-1.py
new file mode 100644
index 0000000000..809cb08ea2
--- /dev/null
+++ b/challenge-264/zapwai/python/ch-1.py
@@ -0,0 +1,20 @@
+def proc(str):
+    letters = list(str)
+    upper = []
+    lower= []
+    for l in letters:
+        if l.isupper():
+            upper.append(l)
+        else:
+            lower.append(l)
+    common = []
+    for u in upper:
+        for l in lower:
+            if u.lower() == l:
+                common.append(u)
+    common.sort()
+    return common[len(common)-1]
+
+str = 'PeRlwEKLy'
+print("Input: str =", str)
+print("Output:", proc(str))