#include <bits/stdc++.h>
#define For(i,a,b) for(int i=a;i<=b;i++)
#define Ford(i,a,b) for(int i=a;i>=b;i--)
#define dream_hyojooslh

using namespace std;
const int N=1067;
int step[N][N],x[N*N],y[N*N],l,r,n,t[N][N],ans;
int dx[6]={-2,-2,0,2,2,0},dy[6]={-1,1,2,1,-1,-2};
string rr[6]={"UL","UR","R","LR","LL","L"},xxx[N*N];
void add(int xx,int yy,int s,int d) {
    if (xx<0||yy<0||xx>=n||yy>=n) return;
    if (step[xx][yy]) return;
    step[xx][yy]=s+1;
    ++r;
    x[r]=xx;
    y[r]=yy;
    t[xx][yy]=d;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    //freopen("dream_hyojooslh.inp","r",stdin);
    cin>>n;
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    For(i,0,n-1) For(j,0,n-1) t[i][j]=-1;
    l=0;
    r=1;
    x[1]=a;y[1]=b;
    step[a][b]=1;
    while (l<r) {
        ++l;
        int xx=x[l];
        int yy=y[l];
        For(i,0,5) add(xx+dx[i],yy+dy[i],step[xx][yy],i);
    }
    if(!step[c][d]) cout<<"Impossible"<<endl; else cout<<step[c][d]-1<<endl;
    while (t[c][d]!=-1) {
        int res=t[c][d];
        ++ans;
        xxx[ans]=rr[res];
        int c1=c-dx[res];
        int d1=d-dy[res];
        c=c1;d=d1;
    }
    Ford(i,ans,1) cout<<xxx[i]<<" ";
    cout<<endl;
    return 0;
}