#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int c=0,a[200];
int y=0;
void UL(int &i,int &j){
    i=i-2;
    j=j-1;
    c++;
    a[y]=1;
    y++;
}

void UR(int &i,int &j){
    i=i-2;
    j=j+1;
    c++;
    a[y]=2;
    y++;
}
void LL(int &i,int &j){
    i=i+2;
    j=j-1;
    c++;
    a[y]=3;
    y++;
}
void LR(int &i,int &j){
    i=i+2;
    j=j+1;
    c++;
    a[y]=4;
    y++;
}
void L(int &i,int &j){
    j=j-2;
    c++;
    a[y]=5;
    y++;
}
void R(int &i,int &j){
    j=j+2;
    c++;
    a[y]=6;
    y++;
}

int main() {
    int n,is,js,ie,je,t=1,u=0;
    cin>>n;
    cin>>is>>js>>ie>>je;
    int i=is,j=js;
    if(ie<is){
        if(je<js){
            while(t==1){
                UL(i,j);
                if(i==ie) {
                    u=1;
                    break;
                }
                if(i==ie+1) {
                    cout<<"Impossible";
                    break;
                }
            }
            while(u==1){
                L(i,j);
                if(j==je) {
                    cout<<c<<endl; 
                    for(int b=0;b<c;b++){
                        if(a[b]==1) cout<<"UL"<<" ";
                        if(a[b]==2) cout<<"UR"<<" ";
                        if(a[b]==3) cout<<"LL"<<" ";
                        if(a[b]==4) cout<<"LR"<<" ";
                        if(a[b]==5) cout<<"L"<<" ";
                        if(a[b]==6) cout<<"R"<<" ";
                    }
                    break;}
                if(j==je+1){
                    cout<<"Impossible";
                    break;
                }
            }
        }
        if(je>js){
             while(t==1){
                UR(i,j);
                if(i==ie) {
                    u=1;
                    break;
                }
                if(i==ie+1) {
                    cout<<"Impossible";
                    break;
                }
            }
            while(u==1){
                R(i,j);
                if(j==je) {
                     cout<<c<<endl; 
                    for(int b=0;b<c;b++){
                        if(a[b]==1) cout<<"UL"<<" ";
                        if(a[b]==2) cout<<"UR"<<" ";
                        if(a[b]==3) cout<<"LL"<<" ";
                        if(a[b]==4) cout<<"LR"<<" ";
                        if(a[b]==5) cout<<"L"<<" ";
                        if(a[b]==6) cout<<"R"<<" ";
                    }
                    break;}
                if(j==je+1){
                    cout<<"Impossible";
                    break;
                }
            }
        }
        if(je==js){
            cout<<"Impossible";
        }
    }  
    
    if(ie>is){
        if(je<js){
             while(t==1){
               LL(i,j);
                if(i==ie) {
                    u=1;
                    break;
                }
                if(i==ie+1) {
                    cout<<"Impossible";
                    break;
                }
            }
            while(u==1){
                L(i,j);
                if(j==je) { 
                     cout<<c<<endl; 
                    for(int b=0;b<c;b++){
                        if(a[b]==1) cout<<"UL"<<" ";
                        if(a[b]==2) cout<<"UR"<<" ";
                        if(a[b]==3) cout<<"LL"<<" ";
                        if(a[b]==4) cout<<"LR"<<" ";
                        if(a[b]==5) cout<<"L"<<" ";
                        if(a[b]==6) cout<<"R"<<" ";
                    } 
                    break;}
                if(j==je+1){
                    cout<<"Impossible";
                    break;
                }
            }
        }
        if(je>js){
             while(t==1){
               LR(i,j);
                if(i==ie) {
                    u=1;
                    break;
                }
                if(i==ie+1) {
                    cout<<"Impossible";
                    break;
                }
            }
            while(u==1){
                R(i,j);
                if(j==je) {
                     cout<<c<<endl; 
                    for(int b=0;b<c;b++){
                        if(a[b]==1) cout<<"UL"<<" ";
                        if(a[b]==2) cout<<"UR"<<" ";
                        if(a[b]==3) cout<<"LL"<<" ";
                        if(a[b]==4) cout<<"LR"<<" ";
                        if(a[b]==5) cout<<"L"<<" ";
                        if(a[b]==6) cout<<"R"<<" ";
                    }
                    break;}
                if(j==je+1){
                    cout<<"Impossible";
                    break;
                }
            } 
        }
        if(je==js){
            cout<<"Impossible";
        }
    }  
    
    if(ie==is){
        if(je<js){
             while(u==0){
                L(i,j);
                if(j==je) { 
                     cout<<c<<endl; 
                    for(int b=0;b<c;b++){
                        if(a[b]==1) cout<<"UL"<<" ";
                        if(a[b]==2) cout<<"UR"<<" ";
                        if(a[b]==3) cout<<"LL"<<" ";
                        if(a[b]==4) cout<<"LR"<<" ";
                        if(a[b]==5) cout<<"L"<<" ";
                        if(a[b]==6) cout<<"R"<<" ";
                    } 
                    break;}
                if(j==je+1){
                    cout<<"Impossible";
                    break;
                }
            }
        }
        if(je>js){
             while(u==0){
                R(i,j);
                if(j==je) { 
                     cout<<c<<endl; 
                    for(int b=0;b<c;b++){
                        if(a[b]==1) cout<<"UL"<<" ";
                        if(a[b]==2) cout<<"UR"<<" ";
                        if(a[b]==3) cout<<"LL"<<" ";
                        if(a[b]==4) cout<<"LR"<<" ";
                        if(a[b]==5) cout<<"L"<<" ";
                        if(a[b]==6) cout<<"R"<<" ";
                    }
                    break;}
                if(j==je+1){
                    cout<<"Impossible";
                    break;
                }
            }
        }
        if(je==js){
            cout<<c;
        }
    }  
    return 0;
}