#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <numeric>
using namespace std;


int main() {
    int n,is,js,ie,je,x=0,y=0,u=0,d=0;
    cin>>n>>is>>js>>ie>>je;
    enum {ul,ur,r,lr,ll,l};
    vector<string> s={"UL","UR","R","LR","LL","L"};
    vector<int> a(6);
    if(!(abs(ie-is)&1))
    {
        y=abs((ie-is)>>1);
    }
    else
    {
        cout<<"Impossible";
        return 0;
    }
    if(abs(y)<=abs(je-js))
    {
        x=abs(je-js)-abs(y);
        if(x&1)
        {
            cout<<"Impossible";
            return 0;
        }
        x/=2;
        if(je>js)
        {
            a[r]+=x;
            if(ie>is)
            {
                a[lr]+=y;
            }
            else
            {
                a[ur]+=y;
            }
        }
        else
        {
            a[l]+=x;
            if(ie>is)
            {
                a[ll]+=y;
            }
            else
            {
                a[ul]+=y;
            }
        }
    }
    else
    {
        int z=abs(ie-is)-2*abs(je-js);
        if(z%4==0)
        {
            if(je>js)
            {
                if(ie>is)
                {
                    a[lr]+=y-z/2;
                }
                else
                {
                    a[ur]+=y-z/2;
                }
            }
            else
            {
                if(ie>is)
                {
                    a[ll]+=y-z/2;
                }
                else
                {
                    a[ul]+=y-z/2;
                }
            }
            for(int i=0;i<z/4;i++)
            {
                if(ie>is)
                {
                    a[ll]++;
                    a[lr]++;
                }
                else
                {
                    a[ul]++;
                    a[ur]++;
                }
            }
        }
        else
        {
            cout<<"Impossible";
            return 0;
        }
    }
    /*cout<<x<<' '<<y<<'\n';
    for(auto x:a)
        cout<<x<<' ';*/
    cout<<accumulate(a.begin(),a.end(),0)<<'\n';
    int i=0;
    while(i<6)
    {
        i=0;
        while(i<6)
        {
            if(!a[i])
            {
                i++;
                continue;
            }
            if(i==ul&&js!=0&&is>1)
            {
                cout<<s[i]<<' ';
                is-=2;
                js--;
                a[i]--;
                i=0;
                break;
            }
            if(i==ur&&js!=n-1&&is>1)
            {
                cout<<s[i]<<' ';
                is-=2;
                js++;
                a[i]--;
                i=0;
                break;
            }
            if(i==r&&js<n-2)
            {
                cout<<s[i]<<' ';
                js+=2;
                a[i]--;
                i=0;
                break;
            }
            if(i==lr&&js!=n-1&&is<n-2)
            {
                cout<<s[i]<<' ';
                is+=2;
                js++;
                a[i]--;
                i=0;
                break;
            }
            if(i==ll&&js!=0&&is<n-2)
            {
                cout<<s[i]<<' ';
                is+=2;
                js--;
                a[i]--;
                i=0;
                break;
            }
            if(i==l&&js>1)
            {
                cout<<s[i]<<' ';
                js-=2;
                a[i]--;
                i=0;
                break;
            }
            i++;
        }
    }
    return 0;
}