#include <iostream>
#include <cmath>
using namespace std;

// Total 8 situations possible
// upper , right, lower , left, upper left , upper right, lower right, lower left

int main(){
    int n;
    cin >> n;
    int i1,j1,i2,j2;
    cin >> i1 >> j1 >> i2 >> j2;
    if((i1-i2)%2!=0){
        cout << "Impossible" << endl;
    }

    //Upper or Lower
    else if(j1==j2){
        if((i1-i2)%4!=0){
            cout << "Impossible" << endl;
        }else{
            int r = abs(i1-i2);
            cout << r/2 << endl;
            //Upper
            if(i1>i2){

                int lCount = r/4;
                int rCount = r/4;
                if(j1-lCount>=0){
                    for(int i=0;i<lCount;i++){
                        cout << "UL ";
                    }
                    for(int i=0;i<rCount;i++){
                        cout << "UR ";
                    }
                    cout << endl;
                }
                else{
                    int q = lCount-j1;
                    for(int i=0;i<lCount-q;i++){
                        cout << "UL ";
                    }
                    for(int i=0;i<q;i++){
                        cout << "UR UL ";
                    }
                    for(int i=0;i<rCount-q;i++){
                        cout << "UR ";
                    }
                    cout << endl;
                }
            }
            // Lower
            else{
                int lCount = r/4;
                int rCount = r/4;
                if(j1+rCount<n){
                    for(int i=0;i<rCount;i++){
                        cout << "LR ";
                    }
                    for(int i=0;i<lCount;i++){
                        cout << "LL ";
                    }
                    cout << endl;
                }
                else{
                    int q = j1+rCount-n+1;
                    for(int i=0;i<rCount-q;i++){
                        cout << "LR ";
                    }
                    for(int i=0;i<q;i++){
                        cout << "LL LR ";
                    }
                    for(int i=0;i<lCount-q;i++){
                        cout << "LL ";
                    }
                    cout << endl;
                }
            }
        }
    }

    // Left or Right
    else if(i1==i2){
        if((j1-j2)%2!=0){
            cout << "Impossible" << endl;
        }else{
            int r = abs(j1-j2);
            cout << r/2 << endl;
            //Left
            if(j1>j2){
                for(int i=0;i<r/2;i++){
                    cout << "L ";
                }
                cout << endl;
            }
            // Right
            else{
                for(int i=0;i<r/2;i++){
                    cout << "R ";
                }
                cout << endl;
            }
        }
    }

    //Upper Left
    else if(i2<i1&&j2<j1){
        int r = i1-i2;
        if((j1-j2+r/2)%2!=0){
            cout << "Impossible" << endl;
        }else{
            if(j1-j2==r/2){
                cout << r/2 << endl;
                for(int i=0;i<r/2;i++){
                    cout << "UL " ;
                }
                cout << endl;
            }else if(j1-j2>r/2){
                cout << (j1-j2+r/2)/2 << endl;
                for(int i=0;i<r/2;i++){
                    cout << "UL " ;
                }
                for(int i=0;i<(j1-j2-r/2)/2;i++){
                    cout << "L ";
                }
                cout << endl;
            }else{
                int p = r/2-j1+j2;
                cout << r/2 << endl;
                int lCount = r/2-p/2;
                int rCount = p/2;
                if(j1-lCount>=0){
                    for(int i=0;i<lCount;i++){
                        cout << "UL ";
                    }
                    for(int i=0;i<rCount;i++){
                        cout << "UR ";
                    }
                    cout << endl;
                }
                else{
                    int q = lCount-j1;
                    for(int i=0;i<lCount-q;i++){
                        cout << "UL ";
                    }
                    for(int i=0;i<q;i++){
                        cout << "UR UL ";
                    }
                    for(int i=0;i<rCount-q;i++){
                        cout << "UR ";
                    }
                    cout << endl;
                }
            }
        }
    }

    //Upper Right
    else if(i2<i1&&j2>j1){
        int r = i1-i2;
        if((j2-j1+r/2)%2!=0){
            cout << "Impossible" << endl;
        }else{
            if(j2-j1==r/2){
                cout << r/2 << endl;
                for(int i=0;i<r/2;i++){
                    cout << "UR ";
                }
                cout << endl;
            }else if(j2-j1>r/2){
                cout << (j2-j1+r/2)/2 << endl;
                for(int i=0;i<r/2;i++){
                    cout << "UR ";
                }
                for(int i=0;i<(j2-j1-r/2)/2;i++){
                    cout << "R ";
                }
                cout << endl;
            }else{
                int p = r/2-j2+j1;
                cout << r/2 << endl;
                int lCount = p/2;
                int rCount = r/2-p/2;
                if(j1-lCount>=0){
                    for(int i=0;i<lCount;i++){
                        cout << "UL ";
                    }
                    for(int i=0;i<rCount;i++){
                        cout << "UR ";
                    }
                    cout << endl;
                }
                else{
                    int q = lCount-j1;
                    for(int i=0;i<lCount-q;i++){
                        cout << "UL ";
                    }
                    for(int i=0;i<q;i++){
                        cout << "UR UL ";
                    }
                    for(int i=0;i<rCount-q;i++){
                        cout << "UR ";
                    }
                    cout << endl;
                }
            }
        }
    }

    //Lower Right
    else if(i2>i1&&j2>j1){
        int r = i2-i1;
        if((j2-j1+r/2)%2!=0){
            cout << "Impossible" << endl;
        }else{
            if(j2-j1==r/2){
                cout << r/2 << endl;
                for(int i=0;i<r/2;i++){
                    cout << "LR ";
                }
                cout << endl;
            }else if(j2-j1>r/2){
                cout << (j2-j1+r/2)/2 << endl;
                for(int i=0;i<(j2-j1-r/2)/2;i++){
                    cout << "R ";
                }
                for(int i=0;i<r/2;i++){
                    cout << "LR ";
                }
                cout << endl;
            }else{
                int p = r/2-j2+j1;
                cout << r/2 << endl;
                int lCount = p/2;
                int rCount = r/2-p/2;
                if(rCount+j1<n){
                    for(int i=0;i<rCount;i++){
                        cout << "LR ";
                    }
                    for(int i=0;i<lCount;i++){
                        cout << "LL ";
                    }
                    cout << endl;
                }
                else{
                    int q = j1+rCount-n+1;
                    for(int i=0;i<rCount-q;i++){
                        cout << "LR ";
                    }
                    for(int i=0;i<q;i++){
                        cout << "LL LR ";
                    }
                    for(int i=0;i<lCount-q;i++){
                        cout << "LL ";
                    }
                    cout << endl;
                }
            }
        }
    }

    //Lower Left
    else if(i2>i1&&j2<j1){
        int r = i2-i1;
        if((j1-j2+r/2)%2!=0){
            cout << "Impossible" << endl;
        }else{
            if(j1-j2==r/2){
                cout << r/2 << endl;
                for(int i=0;i<r/2;i++){
                    cout << "LL ";
                }
                cout << endl;
            }else if(j1-j2>r/2){
                cout << (j1-j2+r/2)/2 << endl;
                for(int i=0;i<r/2;i++){
                    cout << "LL ";
                }
                for(int i=0;i<(j1-j2-r/2)/2;i++){
                    cout << "L ";
                }
                cout << endl;
            }else{
                int p = r/2-j1+j2;
                cout << r/2 << endl;
                int lCount = r/2-p/2;
                int rCount = p/2;
                if(rCount+j1<n){
                    for(int i=0;i<rCount;i++){
                        cout << "LR ";
                    }
                    for(int i=0;i<lCount;i++){
                        cout << "LL ";
                    }
                    cout << endl;
                }
                else{
                    int q = j1+rCount-n+1;
                    for(int i=0;i<rCount-q;i++){
                        cout << "LR ";
                    }
                    for(int i=0;i<q;i++){
                        cout << "LL LR ";
                    }
                    for(int i=0;i<lCount-q;i++){
                        cout << "LL ";
                    }
                    cout << endl;
                }
            }
        }
    }

    return 0;
}