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

// UL UR
//
//R     L
//
// LL LR

int main() {
    int n;
    int x,y;
    int x2,y2;
    
    cin >> n >> y >> x >> y2 >> x2;
    std::vector<int> path;
    while(true) {
        if (y == y2) {
            if (x2 == x)
                break;
            if (abs(x2 - x) % 2 != 0) {
                std::cout << "Impossible" << std::endl;
                return 0;
            } else if (x2 - 2 >= x) {
                x = x + 2;
                path.push_back(3);
            } else if (x2 + 2 <= x) {
                x = x - 2;
                path.push_back(6);
            } else {
                std::cout << "Impossible" << std::endl;
                return 0;
            }
        } else if (abs(y - y2) % 2 == 0) {
            if (y - y2 > 0) {
                if (x >= x2) {
                    path.push_back(1);
                    y-=2;
                    x-=1;
                } else {
                    y-=2;
                    x+=1;
                    path.push_back(2);
                }
                //UL UR
            } else if (y - y2 < 0) {
                //LL LR
                if (x  <=x2) {
                    path.push_back(4);
                    y+=2;
                    x+=1;
                } else {
                    y+=2;
                    x-=1;
                    path.push_back(5);
                }
            }
        } else {
                std::cout << "Impossible" << std::endl;
                return 0;
        }
    }
                 //1  2  3  4   5  6
                //UL, UR, R, LR, LL, L
    std::cout << path.size() << std::endl;
    std::sort(path.begin(),path.end());
    for (int p : path ) {
        std::string jancsi;
            
        switch (p) {
            case 1:
                jancsi = "UL";
                break;
            case 2:
                jancsi = "UR";
                break;
            case 3:
                jancsi = "R";
                break;
                case 4:
                jancsi = "LR";
                break;
                case 5:
                jancsi = "LL";
                break;
                case 6:
                jancsi = "L";
                break;
        }
        
        std::cout << jancsi << " ";
    }
    return 0;
}