import java.util.*;

public class codeSprint12_redKnight {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int x = scan.nextInt();
		int y = scan.nextInt();
		int X = scan.nextInt();
		int Y = scan.nextInt();
		
		if(X>=x)
		{
			int flag=0;
			int c=0;
			if(Y>=y)
			{
				int moves[] = new int[1000];
				int m1=0;
				while(true)
				{
					if(x==X)
					{
						int fi = 0;
						while(true)
						{
							y = y+2;
							if(y>n-1)
							{
								flag=1;
								break;
							}
							c++;
							//System.out.print("R ");
							moves[m1++]=3;
							if(y==Y)
							{
								fi=1;
								break;
							}
							
								
						}
						if(fi==1)
							break;
						else
						{
							flag=1;
							break;
						}
					}
					else{
						x = x+2;
						y = y+1;
						if(x>n-1 || y>n-1)
						{
							flag=1;
							break;
						}
						moves[m1++]=4;
						c++;
						//System.out.print("LR ");
					}
					
					if(x==X && y==Y)
						break;
					
				}
				if(flag==1)
					System.out.println("Impossible");
				else
				{
					System.out.println(c);
					for(int i=0;i<m1;i++)
					{
						if(moves[i]==3)
							System.out.print("R ");
						if(moves[i]==4)
							System.out.print("LR ");
					}
				}
				
			}
			else if(Y<=y)
			{
				
				int moves[] = new int[1000];
				int m1=0;
				c=0;
				while(true)
				{
					if(x==X)
					{
						int fi = 0;
						while(true)
						{
							y = y-2;
							if(y<0)
							{
								flag=1;
								break;
							}
							c++;
							//System.out.print("R ");
							moves[m1++]=0;
							if(y==Y)
							{
								fi=1;
								break;
							}
							
								
						}
						if(fi==1)
							break;
						else
						{
							flag=1;
							break;
						}
					}
					else{
						x = x+2;
						y = y-1;
						if(x>n-1 || y<0)
						{
							flag=1;
							break;
						}
						moves[m1++]=5;
						c++;
						//System.out.print("LR ");
					}
					
					if(x==X && y==Y)
						break;
					
				}
				if(flag==1)
					System.out.println("Impossible");
				else
				{
					System.out.println(c);
					for(int i=0;i<m1;i++)
					{
						if(moves[i]==0)
							System.out.print("L ");
						if(moves[i]==5)
							System.out.print("LL ");
					}
				}
			}
			
		}
		
		else if(X<=x)
		{
			int flag=0;
			int c=0;
			if(Y>=y)
			{
				int moves[] = new int[1000];
				int m1=0;
				while(true)
				{
					if(x==X)
					{
						int fi = 0;
						while(true)
						{
							y = y+2;
							if(y>n-1)
							{
								flag=1;
								break;
							}
							c++;
							//System.out.print("R ");
							moves[m1++]=3;
							if(y==Y)
							{
								fi=1;
								break;
							}
							
								
						}
						if(fi==1)
							break;
						else
						{
							flag=1;
							break;
						}
					}
					else{
						x = x-2;
						y = y+1;
						if(x<0 || y>n-1)
						{
							flag=1;
							break;
						}
						moves[m1++]=2;
						c++;
						//System.out.print("UR ");
					}
					
					if(x==X && y==Y)
						break;
					
				}
				if(flag==1)
					System.out.println("Impossible");
				else
				{
					System.out.println(c);
					for(int i=0;i<m1;i++)
					{
						if(moves[i]==3)
							System.out.print("R ");
						if(moves[i]==2)
							System.out.print("UR ");
					}
				}
			}
			
			else if(Y<=y)
			{
				
				int moves[] = new int[1000];
				int m1=0;
				c=0;
				while(true)
				{
					if(x==X)
					{
						int fi = 0;
						while(true)
						{
							y = y-2;
							if(y<0)
							{
								flag=1;
								break;
							}
							c++;
							//System.out.print("R ");
							moves[m1++]=0;
							if(y==Y)
							{
								fi=1;
								break;
							}
							
								
						}
						if(fi==1)
							break;
						else
						{
							flag=1;
							break;
						}
					}
					else{
						x = x-2;
						y = y-1;
						if(x<0 || y<0)
						{
							flag=1;
							break;
						}
						moves[m1++]=1;
						c++;
						//System.out.print("LR ");
					}
					
					if(x==X && y==Y)
						break;
					
				}
				if(flag==1)
					System.out.println("Impossible");
				else
				{
					System.out.println(c);
					for(int i=0;i<m1;i++)
					{
						if(moves[i]==0)
							System.out.print("L ");
						if(moves[i]==1)
							System.out.print("UL ");
					}
				}
			}
				
		}
		
	}

}