diff --git a/solutions/131A.py b/solutions/131A.py
new file mode 100644
index 0000000..a5ab99e
--- /dev/null
+++ b/solutions/131A.py
@@ -0,0 +1,28 @@
+import string,sys
+
+s = list(input())
+
+option_one = True
+for i in string.ascii_lowercase:
+    if i in s:
+        option_one = False
+
+option_two = True
+if len(s) > 1:
+    for i in range(1, len(s)):
+        for j in string.ascii_lowercase:
+            if s[i] == j:
+                option_two = False
+comp = len(s) == 1 or option_two
+
+if not (comp or option_one):
+    print(''.join(c for c in s))
+    sys.exit()
+
+for idx, i in enumerate(s):
+    if i in string.ascii_uppercase:
+        s[idx] = i.lower()
+    else:
+        s[idx] = i.upper()
+
+print(''.join(c for c in s))