#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n,str,stc,endr,endc,r,c;
    bool flag = false;
    cin>>n>>str>>stc>>endr>>endc;
    r = abs(str-endr);
    c = abs(stc-endc);
    int x = r/2;
    int y = (c - x)/2;
    if(r%2)
        flag = true;
    else if((c-r/2)%2)
        flag = true;
    else if(c!=0)
    {
        cout<<x+y<<endl;
        if(str<endr)
        {
            if(stc<endc)
            {
                while(y--)
                    cout<<"R ";
                while(x--)
                    cout<<"LR ";
                cout<<endl;
            }
            else
            {
                while(x--)
                    cout<<"LR ";
                while(y--)
                    cout<<"L ";
                cout<<endl;
            }
        }
        else
        {
            if(stc<endc)
            {
                while(x--)
                    cout<<"UR ";
                while(y--)
                    cout<<"R ";

                cout<<endl;
            }
            else
            {
                while(x--)
                    cout<<"UL ";
                while(y--)
                    cout<<"L ";
                cout<<endl;
            }
        }
    }
    else{
        if(x%2)
            flag =true;
        else{
            cout<<x<<endl;
            while(x)
            {
                cout<<"LR LL ";
                x -= 2;
            }
            cout<<endl;
        }
    }
    if(flag)
        cout<<"Impossible"<<endl;
    return 0;
}