using System;
using System.Linq;
class Program
{
static void Main() {
string[] arr = { "c#", "java", "python", "c++", "swift" };
var Query = from word in arr
where word[0] == 'c'
select word;
foreach (string s in Query) {
Console.WriteLine(s);
}
}
}
/*
run:
c#
c++
*/