#include <bits/stdc++.h>
#include <cmath>

using namespace std;

void printShortestPath(int n, int i_start, int j_start, int i_end, int j_end) {
    int total=0;
    int ci=i_start, cj=j_start;
    if((abs(i_end-i_start))%2==0)
    {
        int cc = ((abs(i_end-i_start))/2)%2;
        switch(cc)
        {
            case 0:
                {
                    if((abs(j_end-j_start))%2==0)
                    {
                        int maxd = (abs(i_end-i_start))/2;
                        total+=((abs(i_end-i_start))/2);
                        if((abs(j_end-j_start))>maxd)
                        {
                            total+=((abs(j_end-j_start)) - maxd)/2;
                        }
                        cout<<total<<endl;
                        
                        while(ci!=i_end || cj!=j_end)
                        {
                            if(i_end>ci)
                            {
                                if(j_end>cj)
                                {
                                    cout<<"LR "<<flush;
                                    cj+=1;
                                    ci+=2;
                                }
                                else
                                {
                                    if(j_end<cj)
                                        {
                                            cout<<"LL "<<flush;
                                            cj-=1;
                                            ci+=2;
                                        }
                                        else
                                        {
                                            cout<<"LR "<<flush;
                                            cj+=1;
                                            ci+=2;
                                        }
                                }
                            }
                            else
                            {
                                if(i_end<ci)
                                {
                                    if(j_end>cj)
                                    {
                                        cout<<"UR "<<flush;
                                        cj+=1;
                                        ci-=2;
                                    }
                                    else
                                    {
                                        cout<<"UL "<<flush;
                                            cj-=1;
                                            ci-=2;
                                    }
                                }
                                else
                                {
                                    if(j_end>cj)
                                    {
                                        cout<<"R "<<flush;
                                        cj+=2;
                                    }
                                    else
                                    {
                                        cout<<"L "<<flush;
                                        cj-=2;
                                    }
                                }
                            }
                        }
                        
                    }
                    else
                    {
                        cout<<"Impossible";
                    }
                    break;
                }
            case 1:
                {
                    if((abs(j_end-j_start))%2==1)
                    {
                        int maxd = (abs(i_end-i_start))/2;
                        total+=((abs(i_end-i_start))/2);
                        if((abs(j_end-j_start))>maxd)
                        {
                            total+=((abs(j_end-j_start)) - maxd)/2;
                        }
                        cout<<total<<endl;
                        
                        while(ci!=i_end || cj!=j_end)
                        {
                            if(i_end>ci)
                            {
                                if(j_end>cj)
                                {
                                    cout<<"LR "<<flush;
                                    cj+=1;
                                    ci+=2;
                                }
                                else
                                {
                                    if(j_end<cj)
                                        {
                                            cout<<"LL "<<flush;
                                            cj-=1;
                                            ci+=2;
                                        }
                                        else
                                        {
                                            cout<<"LR "<<flush;
                                            cj+=1;
                                            ci+=2;
                                        }
                                }
                            }
                            else
                            {
                                if(i_end<ci)
                                {
                                    if(j_end>cj)
                                    {
                                        cout<<"UR "<<flush;
                                        cj+=1;
                                        ci-=2;
                                    }
                                    else
                                    {
                                        cout<<"UL "<<flush;
                                            cj-=1;
                                            ci-=2;
                                    }
                                }
                                else
                                {
                                    if(j_end>cj)
                                    {
                                        cout<<"R "<<flush;
                                        cj+=2;
                                    }
                                    else
                                    {
                                        cout<<"L "<<flush;
                                        cj-=2;
                                    }
                                }
                            }
                        }
                    }
                    else
                    {
                        cout<<"Impossible";
                    }
                    break;
                }
        }
    }
    else
    {
        cout<<"Impossible";
    }
}

int main() {
    int n;
    cin >> n;
    int i_start;
    int j_start;
    int i_end;
    int j_end;
    cin >> i_start >> j_start >> i_end >> j_end;
    printShortestPath(n, i_start, j_start, i_end, j_end);
    return 0;
}