/* realRPG | India */

#include "bits/stdc++.h"

#define ll unsigned long long
#define vi  vector <int>
#define vs  vector <string>
#define vll  vector <long long>
#define vpii vector <pair <int, int> >
#define vpss vector <pair <string, string> >
#define vpll vector <pair <long long, long long> >

#define pii pair <int,int>
#define pll pair <long long, long long>
#define pss pair <string, string>

#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()

#define fi(i,a,b,c) for(int i=a; i<b; i+=c)
#define fl(i,a,b,c) for(long long i=a; i<b; i+=c)
#define rfi(i,a,b,c) for(int i=a; i>=b; i-=c)
#define rfl(i,a,b,c) for(long long i=a; i>=b; i-=c)

#define pb  push_back
#define mk  make_pair
#define ep  emplace_back
#define F first
#define S second

using namespace std;

const ll md = 1e9 + 7;
const ll MAX = 1e5 + 5;
const ll MAXN = 1e6 + 10;

/*inline ll fsc() {
        ll ip = getchar(), ret = 0, flag = 1;
        for (; ip<'0' || ip>'9'; ip = getchar())
                if (ip == '-') {
                        flag = -1; ip = getchar();
                        break;
                }
        for (; ip >= '0'&&ip <= '9'; ip = getchar())
                ret = ret * 10 + ip - '0';
        return flag*ret;
}*/
ll ar[6]={0};
ll ct=0;

void fun(ll a,ll b,ll c,ll d) {
    if(a==c && b==d) {
        return;
    }
    if(c<a) {
        if(d<=b) {
            ar[0]+=1;
            ct++;
            a-=2; b-=1;
            fun(a,b,c,d);
        } else {
            ar[1]+=1;
            ct++;
            a-=2; b+=1;
            fun(a,b,c,d); 
        }        
    }  else if(c>a) {
        if(d>=b) {
            ar[3]+=1;
            ct++;
            a+=2; b+=1;
            fun(a,b,c,d);
        } else {
            ar[4]+=1;
            ct++;
            a+=2; b-=1;
            fun(a,b,c,d);
        }
    } 
    else if(b<d && d-b>1) {
        ar[2]+=1;
        ct++;
        b+=2;
        fun(a,b,c,d); 
    }
    else if(d<b && b-d>1) {
        ar[5]+=1;
        ct++;
        b-=2;
        fun(a,b,c,d);
    }
}

void solve() {
    ll n; cin >>n;
    ll a,b,c,d;
    cin >>a>>b>>c>>d;
    ll flaga=a%2;
    ll flagb=b%2;
    ll flagm=0;
    if(flaga==c%2) {
        if((c-a)%4==0) {
            if(flagb==d%2) {
                flagm=1;
                fun(a,b,c,d);
                cout <<ct<<"\n";

                fi(i,0,6,1) {
                    fi(j,0,ar[i],1) {
                         if(i==0) {
                            cout <<"UL ";
                            continue;                             
                         } if(i==1) {
                            cout <<"UR ";
                            continue;
                             
                         } if(i==2) {
                            cout <<"R ";
                            continue;
                             
                         } if(i==3) {
                            cout <<"LR ";
                            continue;
                             
                         } if(i==4) {
                            cout <<"LL ";
                            continue;
                             
                         } if(i==5) {
                            cout <<"L ";
                            continue;
                             
                         }
                     } 
                }

            }
        } else {
            if(flagb!=d%2) {
                flagm=1;
                fun(a,b,c,d);
                cout <<ct<<"\n";
                fi(i,0,6,1) {
                    fi(j,0,ar[i],1) {
                         if(i==0) {
                            cout <<"UL ";
                            continue;                             
                         } if(i==1) {
                            cout <<"UR ";
                            continue;
                             
                         } if(i==2) {
                            cout <<"R ";
                            continue;
                             
                         } if(i==3) {
                            cout <<"LR ";
                            continue;
                             
                         } if(i==4) {
                            cout <<"LL ";
                            continue;
                             
                         } if(i==5) {
                            cout <<"L ";
                            continue;
                             
                         }
                     } 
                }
            }
        }
    } if(flagm==0) {
        cout <<"Impossible"; 
    }    
} 

int main() { 
  ios_base::sync_with_stdio(false); 
  cin.tie(NULL); 
  cout.tie(NULL); 
  solve(); 
  return 0; 
}