import java.io.*;
import java.util.*;
import java.math.*;
import java.lang.*;
 
import static java.lang.Math.*;
 
public class Main implements Runnable
{
	static class InputReader
	{
		private InputStream stream;
		private byte[] buf = new byte[1024];
		private int curChar;
		private int numChars;
		private SpaceCharFilter filter;
		private BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

		public InputReader(InputStream stream)
		{
			this.stream = stream;
		}
		
		public int read()
		{
			if (numChars==-1) 
				throw new InputMismatchException();
			
			if (curChar >= numChars)
			{
				curChar = 0;
				try 
				{
					numChars = stream.read(buf);
				}
				catch (IOException e)
				{
					throw new InputMismatchException();
				}
				
				if(numChars <= 0)				
					return -1;
			}
			return buf[curChar++];
		}
	 
		public String nextLine()
		{
			String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
		}
		public int nextInt()
		{
			int c = read();
			
			while(isSpaceChar(c)) 
				c = read();
			
			int sgn = 1;
			
			if (c == '-') 
			{
				sgn = -1;
				c = read();
			}
			
			int res = 0;
			do 
			{
				if(c<'0'||c>'9') 
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			}
			while (!isSpaceChar(c)); 
			
			return res * sgn;
		}
		
		public long nextLong() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') 
			{
				sgn = -1;
				c = read();
			}
			long res = 0;
			
			do 
			{
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			}
			while (!isSpaceChar(c));
				return res * sgn;
		}
		
		public double nextDouble() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') 
			{
				sgn = -1;
				c = read();
			}
			double res = 0;
			while (!isSpaceChar(c) && c != '.') 
			{
				if (c == 'e' || c == 'E')
					return res * Math.pow(10, nextInt());
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			}
			if (c == '.') 
			{
				c = read();
				double m = 1;
				while (!isSpaceChar(c)) 
				{
					if (c == 'e' || c == 'E')
						return res * Math.pow(10, nextInt());
					if (c < '0' || c > '9')
						throw new InputMismatchException();
					m /= 10;
					res += (c - '0') * m;
					c = read();
				}
			}
			return res * sgn;
		}
		
		public String readString() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do 
			{
				res.appendCodePoint(c);
				c = read();
			} 
			while (!isSpaceChar(c));
			
			return res.toString();
		}
	 
		public boolean isSpaceChar(int c) 
		{
			if (filter != null)
				return filter.isSpaceChar(c);
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}
	 
		public String next() 
		{
			return readString();
		}
		
		public interface SpaceCharFilter 
		{
			public boolean isSpaceChar(int ch);
		}
	}
 	
	public static void main(String args[]) throws Exception
	{
		new Thread(null, new Main(),"Main",1<<26).start();
	}
	public void run()
	{
		InputReader sc = new InputReader(System.in);
		PrintWriter w = new PrintWriter(System.out);
       
        int n = sc.nextInt();
        int sx = sc.nextInt();
        int sy = sc.nextInt();
        int ex = sc.nextInt();
        int ey = sc.nextInt();
        Queue<Pair> queue = new LinkedList<>();
        Pair ans = null;
        int visited[][] = new int[n][n];
        Pair[][] pair = new Pair[n][n];
        visited[sx][sy] = 1;
        queue.add(new Pair(sx, sy, -1, -1));
        while(!queue.isEmpty()) {
            Pair cur = queue.poll();
            pair[cur.x][cur.y] = cur;
            if(cur.x == ex && cur.y == ey) {
                ans = cur;
                break;
            }
            int x = cur.x;
            int y = cur.y;
            if(y + 2 < n && visited[x][y + 2] == 0) {
                queue.add(new Pair(x, y + 2, x, y));
                visited[x][y + 2] = 1;
            }
            if(y - 2 >= 0 && visited[x][y - 2] == 0) {
                queue.add(new Pair(x, y - 2, x, y));
                visited[x][y - 2] = 1;
            }
            if(x + 2 < n && y + 1 < n && visited[x + 2][y + 1] == 0) {
                queue.add(new Pair(x + 2, y + 1, x, y));
                visited[x + 2][y + 1] = 1;
            }
            if(x + 2 < n && y - 1 >= 0 && visited[x + 2][y - 1] == 0) {
                queue.add(new Pair(x + 2, y - 1, x, y));
                visited[x + 2][y - 1] = 1;
            }
            if(x - 2 >= 0 && y + 1 < n && visited[x - 2][y + 1] == 0) {
                queue.add(new Pair(x - 2, y + 1, x, y));
                visited[x - 2][y + 1] = 1;
            }
            if(x - 2 >= 0 && y - 1 >= 0 && visited[x - 2][y - 1] == 0) {
                queue.add(new Pair(x - 2, y - 1, x, y));
                visited[x - 2][y - 1] = 1;
            }
        }
        if(ans == null) {
            w.print("Impossible");
        }
        else {
            ArrayList<String> list = new ArrayList<>();
            int x = ex;
            int y = ey;
            while(x != sx && y != sy) {
                int nx = pair[x][y].px;
                int ny = pair[x][y].py;
                if(x - nx == 2 && y - ny == 1) 
                    list.add("UR");
                if(x - nx == 2 && y - ny == -1)
                    list.add("UL");
                if(x - nx == -2 && y - ny == -1)
                    list.add("LL");
                if(x - nx == -2 && y - ny == 1)
                    list.add("LR");
                if(y - ny == 2)
                    list.add("R");
                if(y - ny == -2)
                    list.add("L");
                x = nx;
                y = ny;
            }
            w.println(list.size());
            for(int i = list.size() - 1; i >= 0; --i)
                w.print(list.get(i) + " ");
        }
		w.close();
	}
}
class Pair {
    int x;
    int y;
    int px;
    int py;
    Pair(int a, int b, int c, int d) {
        x = a;
        y = b;
        px = c;
        py = d;
    }
}