using System;

public class Program

{

public static int fn;

public static int p;

public static int q;

public static int n;

public static int gcd(int a,int b)

{

while (a!=b)

{

if (a>b)a=a-b;

else b=b-a;

}

    return a;

}

public static bool priame(int no)

{

for (int i=2;i<no;i++)

if (no %i==0)

return false;

return true;

}

public static int publickey(){

int e=2;

while(gcd(e,fn)!=1){

e++;}

return e;

}

public static int pravteket(){

int e=publickey();

int d=2;

while((e*d)%fn!=1){

e++;}

return e;

}

public static double crypto1(int M,int key){

return (Math.Pow(M,key))%n;

}

public static int invers(int key){

int x=1;

while((x*key)%26!=1){

x++;}

return x;

}

public static string crpto2(string input,int key)

{

string output="";

for (int i=0;i<input.Length;i++)

if (char.IsLetter(input[i]))

output+=(char)((((input[i]-97)*key)%26)+97);

else

output+=input[i];

return output;

}

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}