#include<iostream>
#include<queue>
#include<stack>
#include<vector>
using namespace std;
int dx[]= {-1, 1, 2, 1,-1,-2};
int dy[]= {-2,-2, 0, 2, 2, 0};
queue <int> qx,qy,qm;
stack <int> stk;
int x1,y1,n;
bool final;
int mat[200][200], px[200][200], py[200][200],dr[200][200];


void dfs()
{
    int nx,ny;
    final=false;
    while(!qx.empty() && final==false)
    {
        int x=qx.front(),y=qy.front();
        //cout<<y<<" "<<x<<endl;
        qx.pop();
        qy.pop();

        //if(x>=n || x<0) return 0;
        //if(x==x1 && y==y1) return 5;


        for(int i=0; i<6; i++)
        {
            nx=x+dx[i], ny=y+dy[i];

            if(nx>=0 && nx<n && ny>=0 && ny<n)
            {

                if(nx==x1 && ny==y1)
                {
                    px[ny][nx]=x;
                    py[ny][nx]=y;
                    dr[ny][nx]=i;
                    final=true;
                    break;
                }
                else if(mat[ny][nx]==0)
                {
                    px[ny][nx]=x;
                    py[ny][nx]=y;
                    dr[ny][nx]=i;
                    //cout<<ny<<" "<<nx<<endl;
                    qx.push(nx);
                    qy.push(ny);
                    mat[ny][nx]=1;
                }
            }
        }
        mat[y][x]=2;
    }
    return ;
}


int main()
{
    int x,y,i,j,p,a,b;
    cin>>n;
    cin>>y>>x>>y1>>x1;
    for(i=0; i<n; i++)
        for(j=0; j<n; j++)
        {
            mat[i][j]=0;
            px[i][j]=400;
            py[i][j]=400;
            dr[i][j]=9;
        }

    qx.push(x);
    qy.push(y);
    mat[y][x]=1;
    dr[y][x]=500;
    dfs();

    //if(a==5)
    if(final==false)
    {
        cout<<"Impossible"<<endl;
        return 0;
    }






    while(dr[y1][x1]!=500)
    {
        stk.push(dr[y1][x1]);
        a=x1,b=y1;
        x1=px[b][a];
        y1=py[b][a];
    }

    cout<<stk.size()<<endl;
    i=0;
    while(!stk.empty())
    {
        a=stk.top();
        stk.pop();
        if(i!=0) cout<<" ";
        if(a==0) cout<<"UL";
        else if(a==1) cout<<"UR";
        else if(a==2) cout<<"R";
        else if(a==3) cout<<"LR";
        else if(a==4) cout<<"LL";
        else if(a==5) cout<<"L";
        i++;
    }
    cout<<endl;

    return 0;
}