#include <bits/stdc++.h>

using namespace std;

#define ST first
#define ND second
#define PB push_back
#define MP make_pair

#define REP(i, n)     for (int (i) = 0; (i) < (n); (i)++)
#define FOR(i, a, b)  for (int (i) = (a); (i) <= (b); (i)++)
#define FORD(i, b, a) for (int (i) = (b); (i) >= (a); (i)--)
#define FORE(x, u)    for (auto (x): (u))
#define ALL(u)        (u).begin(), (u).end()

#define INF   0x7fffffff
#define INFLL 0x7fffffffffffffffLL

typedef long long LL;
typedef unsigned long long ULL;
typedef long double LD;
typedef pair<int, int> PII;
typedef pair<LL, LL> PLL;
typedef vector<int> VI;
typedef vector<LL> VLL;
typedef vector<PII> VPII;
typedef vector<PLL> VPLL;
typedef set<int> SI;
typedef set<LL> SLL;
typedef set<PII> SPII;
typedef set<PLL> SPLL;

inline void get(int &x) { scanf("%d", &x); }
inline void get(LL &x) { scanf("%lld", &x); }
inline void get(ULL &x) { scanf("%llu", &x); }
inline void get(double &x) { scanf("%lf", &x); }
inline void get(LD &x) { scanf("%Lf", &x); }
inline void get(char *s) { scanf("%s", s); }
inline void get(char &c) { while ((c = getchar()) > 126 || c < 33); }
inline void put(int x) { printf("%d", x); }
inline void put(LL x) { printf("%lld", x); }
inline void put(ULL x) { printf("%llu", x); }
inline void put(double x) { printf("%lf", x); }
inline void put(LD x) { printf("%Lf", x); }
inline void put(const char *s) { printf(s); }
inline void put(char c) { putchar(c); }
template<typename T> inline void putl(const T &x) { put(x), put(' '); }
template<typename T> inline void putn(const T &x) { put(x), put('\n'); }

int main() {
    int n; get(n);
    int x0, y0, x1, y1;
    get(x0); get(y0); get(x1); get(y1);
    int rows_diff = abs(x1 - x0);
    int cols_diff = abs(y1 - y0);
    if (rows_diff % 2 != 0 || cols_diff % 2 != (rows_diff / 2) % 2) {
        putn("Impossible"); return 0;
    }
    int moves = rows_diff / 2;
    if (cols_diff > rows_diff / 2) {
        moves += (cols_diff - rows_diff / 2) / 2;
    }
    putn(moves);
    while (x0 > x1) {
        if (y0 >= y1) {
            putl("UL");
            x0 -= 2;
            y0--;
        } else {
            putl("UR");
            x0 -= 2;
            y0++;
        }
    }
    while (y0 < y1 - rows_diff / 2) {
        putl("R");
        y0 += 2;
    }
    while (x0 < x1) {
        if (y0 <= y1) {
            putl("LR");
            x0 += 2;
            y0++;
        } else {
            putl("LL");
            x0 += 2;
            y0--;
        }
    }
    while (y0 > y1) {
        putl("L");
        y0 -= 2;
    }
    return 0;
}