Added 443A - Anton and Letters.cpp

Author: vikashpatel24

443A - Anton and Letters.cpp

@@ -0,0 +1,21 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+// Code Written By: Vikash Patel
+
+// Codeforces Profile: https://codeforces.com/profile/vikashpatel
+
+int main()
+{
+    string s;
+    getline(cin,s);
+    set<char> ans;
+    for(int i=0;i<s.size();i++)
+    {
+        if(s[i]=='{' || s[i]==',' || s[i]==' ' || s[i]=='}')
+        continue;
+        else
+        ans.insert(s[i]);
+    }
+    cout<<ans.size()<<endl;
+}