using System;

using System.Numerics;

public class Program

{

    public static void Main()

    {

        BigInteger a = 0;

        BigInteger del = 0;

        BigInteger nad = 0;

        for(BigInteger i=0; i<210; i++)

        {

            a = i%19;

            BigInteger b = i%11;

            BigInteger c = 0;

            BigInteger d = BigInteger.ModPow(i,9,19);

            BigInteger cc = 0;

            BigInteger dd = BigInteger.ModPow(i,5,11);

            if(d == 18)

                c = -1;

            else c = 1;

            if(dd == 10)

                cc = -1;

            else cc = 1;

            if(a == 0 | b == 0)

                continue;

            else 

            {

                if(c == cc)

                {

                    if(c==1)

                        Console.WriteLine(i + "-1 mod 177 = ");//Console.WriteLine(i);

                    if(c == cc & c==-1)

                        continue;//Console.WriteLine(i + " нет обратного числа");

                }

                else continue;//Console.WriteLine("-");

            }

        }

    }

}