using System;
using System.Text.RegularExpressions;
class Program
{
static void Main() {
string str = "EchoCoraKatnissXavierSpock";
string[] arr = Regex.Split(str, @"(?<!^)(?=[A-Z])");
Console.WriteLine(string.Join(", ", arr));
}
}
/*
run:
Echo, Cora, Katniss, Xavier, Spock
*/