using System;
using System.Text;

public class A {
    string src = "using System;\nusing System.Text;\n\npublic class A {\n    string src = \"?\";\n    public void run() {\n        int p = src.IndexOf(\"?\");\n        string s = src.Substring(0, p) + escape(src) + src.Substring(p + 1);\n        Console.Write(s);\n    }\n    public static string escape(string s) {\n        string str = \"\";\n        for (int p = 0; p < s.Length; ++p) {\n            char c = s[p];\n            switch (c) {\n                case \'\\\"\':\n                    str += \"\\\\\\\"\";\n                    break;\n                case \'\\\'\':\n                    str += \"\\\\\\\'\";\n                    break;\n                case \'\\n\':\n                    str += \"\\\\n\";\n                    break;\n                case \'\\\\\':\n                    str += \"\\\\\\\\\";\n                    break;\n                default:\n                    str += c;\n                    break;\n            }\n        }\n        return str;\n    }\n    public static void Main(string[] args)\n    {\n        A main = new A();\n        main.run();\n    }\n}";
    public void run() {
        int p = src.IndexOf("?");
        string s = src.Substring(0, p) + escape(src) + src.Substring(p + 1);
        Console.Write(s);
    }
    public static string escape(string s) {
        string str = "";
        for (int p = 0; p < s.Length; ++p) {
            char c = s[p];
            switch (c) {
                case '\"':
                    str += "\\\"";
                    break;
                case '\'':
                    str += "\\\'";
                    break;
                case '\n':
                    str += "\\n";
                    break;
                case '\\':
                    str += "\\\\";
                    break;
                default:
                    str += c;
                    break;
            }
        }
        return str;
    }
    public static void Main(string[] args)
    {
        A main = new A();
        main.run();
    }
}