using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace Soft
{
    class Program
    {
        static void Main(string[] args)
        {
            var phrase = "\"ogin\":\"RED\",\"foto_i\",\"ogin\":\"GREEN\",\"foto_i\",\"ogin\":\"BLUE\",\"foto_i\"" +
                         ",\"foto_i\",\"ogin\":\"BLUE\",\"foto_i\"";
            var split = phrase.Split(new[] { "\"ogin\":", ",\"foto_i\"", "," }, StringSplitOptions.RemoveEmptyEntries);
            Console.WriteLine(string.Join(", ", split));
        }
    }
}
 

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