#include<stdio.h>
#include<math.h>
#include<vector>
#include<string>
#include<algorithm>

using namespace std;

int main ()
{
    int n;
    scanf("%d",&n);
    int x0,y0,x1,y1;
    scanf("%d %d %d %d", &x0, &y0, &x1, &y1);
    int mat [n][n];
    vector <int> mov;
    /*
        UL = 0
        UR = 1
        R  = 2
        LR = 3
        LL = 4
        L  = 5
    */



    bool sw = true;
    int valAbs= fabs(x0-x1);
    if(valAbs%2 ==0){
        while(x0 > x1){
            if(y0 < y1){
                mov.push_back(1);
                x0=x0-2;
                y0=y0+1;
            }
            else if (y0 > y1){
                mov.push_back(0);
                x0=x0-2;
                y0=y0-1;
            }
            else {
                x0=x0-4;
                if(y0 == n-1){
                    mov.push_back(0);
                    mov.push_back(1);
                }
                else{
                    mov.push_back(1);
                    mov.push_back(0);
                }
            }
        }

        while(x0 < x1){
            if( y0 < y1){
                if((y1 - y0)%2==1 && (y1 - y0)!= 1){
                    y0=y0+2;
                    mov.push_back(2);
                }
                else{
                    mov.push_back(3);
                    x0=x0+2;
                    y0=y0+1;
                }
            }
            else if (y0 > y1){
                mov.push_back(4);
                x0=x0+2;
                y0=y0-1;
            }
            else{
                x0 = x0 + 4;
                if(y0 == n-1){
                    mov.push_back(4);
                    mov.push_back(3);
                }
                else{
                    mov.push_back(3);
                    mov.push_back(4);
                }
            }
        }
        while(x0 == x1){
            if(y0 == y1){
                sw= true;
                break;
            }
            else{
                if(y0 < y1){
                   mov.push_back(2);
                   y0=y0+2;
                }
                else {
                    mov.push_back(5);
                    y0=y0-2;
                }
            }
            if(fabs(y0-y1)==1){
                sw=false;
                printf("Impossible");
                break;
            }
        }
    }
    else{
        printf("Impossible");
        sw=false;
    }
    if(sw){
        int tam = mov.size();
        printf("%d\n",tam);
        sort(mov.begin(),mov.end());
        for(int i = 0; i < tam-1; i++){
            if(mov[i]== 0){
                printf("UL ");
            }
            else if (mov[i]==1){
                printf("UR ");
            }
            else if (mov[i]==2){
                printf("R ");
            }
            else if (mov[i]==3){
                printf("LR ");
            }
            else if (mov[i]==4){
                printf("LL ");
            }
            else if( mov[i]==5){
                printf("L ");
            }
        }

        if(mov[tam-1]== 0){
            printf("UL");
        }
        else if (mov[tam-1]==1){
            printf("UR");
        }
        else if (mov[tam-1]==2){
            printf("R");
        }
        else if (mov[tam-1]==3){
            printf("LR");
        }
        else if (mov[tam-1]==4){
            printf("LL");
        }
        else if( mov[tam-1]==5){
            printf("L");
        }
    }
    return 0;
}