//{
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double lf;
typedef pair<ll,ll> ii;
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define FILL(i,n) memset(i,n,sizeof i)
#define X first
#define Y second
#define SZ(_a) (int)_a.size()
#define ALL(_a) _a.begin(),_a.end()
#define pb push_back
#ifdef brian
#define debug(...) do{\
    fprintf(stderr,"%s - %d (%s) = ",__PRETTY_FUNCTION__,__LINE__,#__VA_ARGS__);\
    _do(__VA_ARGS__);\
}while(0)
template<typename T>void _do(T &&_x){cerr<<_x<<endl;}
template<typename T,typename ...S> void _do(T &&_x,S &&..._t){cerr<<_x<<" ,";_do(_t...);}
template<typename _a,typename _b> ostream& operator << (ostream &_s,const pair<_a,_b> &_p){return _s<<"("<<_p.X<<","<<_p.Y<<")";}
template<typename It> ostream& _OUTC(ostream &_s,It _ita,It _itb)
{
    _s<<"{";
    for(It _it=_ita;_it!=_itb;_it++)
    {
        _s<<(_it==_ita?"":",")<<*_it;
    }
    _s<<"}";
    return _s;
}
template<typename _a> ostream &operator << (ostream &_s,vector<_a> &_c){return _OUTC(_s,ALL(_c));}
template<typename _a> ostream &operator << (ostream &_s,set<_a> &_c){return _OUTC(_s,ALL(_c));}
template<typename _a,typename _b> ostream &operator << (ostream &_s,map<_a,_b> &_c){return _OUTC(_s,ALL(_c));}
template<typename _t> void pary(_t _a,_t _b){_OUTC(cerr,_a,_b);cerr<<endl;}
#define IOS()
#else
#define debug(...)
#define pary(...)
#define endl '\n'
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0);
#endif // brian
//}


const ll MAXn=2e2+5,MAXlg=__lg(MAXn)+2;
const ll MOD=1000000007;
const ll INF=ll(1e15);

int dis[MAXn][MAXn],trs[MAXn][MAXn];
int dx[]={-2,-2,0,2,2,0};
int dy[]={-1,1,2,1,-1,-2};
string nm[]={"UL","UR","R","LR","LL","L"};
ll n;


inline bool ok(int x,int y)
{
  return x>=0&&x<n&&y>=0&&y<n;
}

int main()
{
    IOS();
    cin>>n;
    ll x,y;
    cin>>x>>y;
    FILL(dis,-1);
    dis[x][y]=0;trs[x][y]=-1;
    queue<ii> q;
    q.push(ii(x,y));
    while(SZ(q))
    {
      x=q.front().X,y=q.front().Y;
      q.pop();
      REP(i,6)
      {
        ll tx=x+dx[i],ty=y+dy[i];
        if(!ok(tx,ty)||dis[tx][ty]!=-1)continue;
        dis[tx][ty]=dis[x][y]+1;
        trs[tx][ty]=i;
        q.push(ii(tx,ty));
      }
    }
    cin>>x>>y;
    if(dis[x][y]==-1){cout<<"Impossible"<<endl;return 0;}
    cout<<dis[x][y]<<endl;
    vector<string> dt;
    while(trs[x][y]!=-1)
    {
      ll t=trs[x][y];
      dt.pb(nm[t]);
      x-=dx[t],y-=dy[t];
    }
    reverse(ALL(dt));
    REP(i,SZ(dt))cout<<dt[i]<<" \n"[i==SZ(dt)-1];
}