using System;
using System.Linq;
public class Test
{
public static void Main()
{
var s = "cC-Cc";
var result = string.Join("-", s.Split('-').Select((x,i) => i % 2 == 0 ? x.ToLower() :x.ToUpper()));
Console.WriteLine(result);
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uTGlucTsKCnB1YmxpYyBjbGFzcyBUZXN0CnsKCXB1YmxpYyBzdGF0aWMgdm9pZCBNYWluKCkKCXsKCQl2YXIgcyA9ICJjQy1DYyI7CgkJdmFyIHJlc3VsdCA9IHN0cmluZy5Kb2luKCItIiwgcy5TcGxpdCgnLScpLlNlbGVjdCgoeCxpKSA9PiBpICUgMiA9PSAwID8geC5Ub0xvd2VyKCkgOnguVG9VcHBlcigpKSk7CgkJQ29uc29sZS5Xcml0ZUxpbmUocmVzdWx0KTsKCX0KfQ==