namespace CsvMatrix
{
    using System;
    using System.IO;
    using System.Linq;

    public class Program
    {
        public static void Main()
        {
            var matrix1 = ReadMatrix(File.ReadAllLines("matrix1.csv"));
            var matrix2 = ReadMatrix(File.ReadAllLines("matrix2.csv"));

            if (matrix1.GetLength(0) != matrix2.GetLength(0) ||
                matrix1.GetLength(1) != matrix2.GetLength(1))
            {
                Console.WriteLine("undefined");
                return;
            }

            Console.WriteLine(CheckForSymmetry(matrix1, matrix2));
        }

        private static int[,] ReadMatrix(string[] rows)
        {
            var cols = rows[0].Split(',');
            var matrix = new int[rows.Length, cols.Length];

            for (int i = 0; i < rows.Length; i++)
            {
                var numbers = rows[i].Split(',').Select(int.Parse).ToArray();

                for (int j = 0; j < cols.Length; j++)
                {
                    matrix[i, j] = numbers[j];
                }
            }

            return matrix;
        }

        private static bool CheckForAntisymmetry(int[,] matrix1, int[,] matrix2)
        {
            for (int i = 0; i < matrix1.GetLength(0); i++)
            {
                for (int j = 0; j < matrix1.GetLength(1); j++)
                {
                    if (matrix1[i, j] != -matrix2[i, j])
                    {
                        return false;
                    }
                }
            }

            return true;
        }
    }
}