diff --git a/15/b/3.py b/15/b/3.py
new file mode 100644
index 0000000..772cd45
--- /dev/null
+++ b/15/b/3.py
@@ -0,0 +1,16 @@
+txt = input().split()
+while txt[-1] != "###":
+   txt += input().split()
+amount = {}
+for i in txt:
+   if i.lower() in amount:
+      amount[i.lower()] += 1
+   else:
+      amount[i.lower()] = 1
+max = ["", 0]
+for i in amount:
+   if amount[i] > max[1]:
+      max = [i, amount[i]]
+   else:
+      pass
+print(max[0])