using System;
using System.Collections.Generic;
using static Assistant.Input;
using static Assistant.Debug;
using System.Linq;
using Assistant;

namespace ABC111D
{
    class Program
    {
        static void Main(string[] args)
        {
            var N = ReadInt;

            var X = new int[N];
            var Y = new int[N];
            for (int i = 0; i < N; i++)
            {
                X[i] = ReadInt;
                Y[i] = ReadInt;
            }

            int guuki = Math.Abs(X[0] + Y[0]) % 2;
            for (int i = 1; i < N; i++)
            {
                if (Math.Abs(X[i] + Y[i]) % 2 != guuki)
                {
                    Console.WriteLine(-1);
                    return;
                }
            }

            List<long> arm = new List<long>();
            if (guuki == 0) arm.Add(1);

            arm.Add(1);
            for (int i = 0; i < 30; i++) //10^9
            {
                arm.Add(arm.Last() * 2);
            }
            Console.WriteLine(arm.Count);
            Console.WriteLine(string.Join(" ", arm));

            string dir = "LRUD";
            for (int n = 0; n < N; n++)
            {
                long x = X[n];
                long y = Y[n];
                string ans = "";

                for (int i = arm.Count - 1; i >= 0; i--)
                {
                    Point[] points = new Point[4];
                    points[0] = new Point() { x = x + arm[i], y = y, index = 0 };
                    points[1] = new Point() { x = x - arm[i], y = y, index = 1 };
                    points[2] = new Point() { x = x, y = y - arm[i], index = 2 };
                    points[3] = new Point() { x = x, y = y + arm[i], index = 3 };

                    points = points.OrderBy(a => a.Abs()).ToArray();
                    ans = dir[points[0].index] + ans;

                    x = points[0].x;
                    y = points[0].y;
                }

                Console.WriteLine(ans);
            }
        }

        struct Point
        {
            public long x;
            public long y;
            public int index;
            public long Abs()
            {
                return Math.Abs(x) + Math.Abs(y);
            }
        }
    }


}

namespace Assistant
{
    static class Input
    {
        static List<string> line = new List<string>();
        static int index = 0;
        static String ReadNext()
        {
            if (line.Count <= index) line.AddRange(Console.ReadLine().Split());
            return line[index++];
        }
        public static int ReadInt => int.Parse(ReadNext());
        public static long ReadLong => long.Parse(ReadNext());
        public static int[] ReadInts => Console.ReadLine().Split().Select(int.Parse).ToArray();
        public static long[] ReadLongs => Console.ReadLine().Split().Select(long.Parse).ToArray();
    }

    static class Debug
    {
        static public void Draw2D(int[,] map, int mode = 1)
        {
#if DEBUG
            int W = map.GetLength(0);
            int H = map.GetLength(1);

            int[,] map2 = new int[W + 1, H + 1];
            for (int i = 0; i < W + 1; i++)
            {
                for (int j = 0; j < H + 1; j++)
                {
                    if (i == 0 && j == 0) map2[i, j] = 0;
                    else if (i == 0) map2[i, j] = j - 1;
                    else if (j == 0) map2[i, j] = i - 1;
                    else map2[i, j] = map[i - 1, j - 1];
                }
            }

            for (int i = 0; i < W + 1; i++)
            {
                for (int j = 0; j < H + 1; j++)
                {
                    if (mode == 0) Console.Write(map2[i, j] % 10);
                    if (mode == 1) Console.Write(map2[i, j] + " ");
                }
                Console.WriteLine();
            }
            Console.WriteLine();
#endif
        }

        public static void Draw1D(int[] array, int mode = 0)
        {
#if DEBUG
            Console.WriteLine(string.Join(" ", array));
#endif
        }
    }
}


Measured memory_bytes: 19772