using System;
using System.Text.RegularExpressions;
namespace ConsoleApplication_C_Sharp
{
static class Program
{
static void Main()
{
string s = "php pdp dhp paip c#";
string reg = Regex.Replace(s, "p.p", "PHP");
Console.WriteLine(s);
Console.WriteLine(reg);
}
}
}
/*
run:
php pdp dhp paip c#
PHP PHP dhPHPaip c#
*/