using System;

public class Program

{

    public static void Main()

    {

        Puzzle1();

        Puzzle2();

    }

    public static void Puzzle1()

    {

        var input = Input();

        var s = input.Split(Environment.NewLine);

        for (int i = 0; i < s.Length - 1; i++){

            for (int j = i+1; j < s.Length - 1; j++){

                var si = int.Parse(s[i]);

                var sj = int.Parse(s[j]);

                if (si + sj == 2020)

                {

                    Console.WriteLine(s[i] + " x " + s[j] + " = " + (si * sj)); 

                }

            }

        }

    }

    public static void Puzzle2()

    {

        var input = Input();

        var s = input.Split(Environment.NewLine);

        for (int i = 0; i < s.Length - 1; i++){

            for (int j = i+1; j < s.Length - 1; j++){

                for (int k = j+1; k < s.Length - 1; k++){

                    var si = int.Parse(s[i]);

                    var sj = int.Parse(s[j]);

                    var sk = int.Parse(s[k]);

                    if (si + sj + sk == 2020)

                    {

                        Console.WriteLine(s[i] + " x " + s[j] + " x " + s[k] + " = " + (si * sj * sk)); 

                    }

                }

            }

        }

    }

    public static string Input()

    {

        return @"1388

508

1855

1249

1405

1618

1286

1485

1827

1188

1369

1977

910

1398

1912

1575

1713

1771

1506

1056

1890

1065

1591

1438

1155

1275

1622

972

1918

1959

1860

1396

1832

1562

1935

1687

1344

1709

1498

1875

1467

1557

1166

1090

1363

1754

987

1548

1334

1315

1300

1043

1417

1040

1955

1440

1635

1519

1305

552

1776

1723

1109

1914

981

1886

1607

1639

1582

1444

1627

1157

2008

1554

1781

1847

1415

1915

1416

1431

1579

1193

1921

1971

1360

1631

1972

1988

1813

1378

1505

1973

1585

1091

1853

1531

731

1546

1895

1348

1913

1387

1885

1204

1499

1975

1664

1828

1616

1841

1129

137

1676

1694

1928

1354

1814

1228

1588

1642

1261

1446

1903

2003

1751

1083

1829

140

1599

1968

1725

1987

1931

1810

1628

2009

1159

1142

1331

1859

1111

1637

1801

1376

1902

1345

1307

1570

1990

1784

1524

1997

1098

1967

1442

1927

1251

1753

1194

1648

1483

1609

1716

1583

1128

1514

1738

1881

1502

1120

1112

433

1033

1208

1982

1544

1169

1306

1690

1590

1938

1177

1819

1568

1666

1682

1844

1783

1774

1688

1925

1471

1203

2007

1769

1323

1370

1689

1268

1868";

    }

}