#!/bin/python3

import sys
moves_possible = ["UL", "UR", "R", "LR", "LL", "L"]
def moving(move, position):
    right = False
    if "R" in move:
        right = True
        position[1] = position[1]+1
    else:
        position[1] = position[1]-1
    if "U" in move:
        position[0] = position[0]-2
    elif "L" in move:
        position[0] = position[0]+2
    else:
        if "R" in move:
            position[1] = position[1]+1
        else:
            position[1] = position[1]-1
    return(position)
def calc_y(a,b):
    diff = abs(a-b)
    if diff%2 == 1:
        return "impossible"
    return diff//2
def allowable_moves(current, destination):
    usable_moves = []
    a,b = current[0],current[1]
    x,y = destination[0],destination[1]
    if b<y:
        usable_moves.append("R")
        if a>x:
            usable_moves.append("UR")
        elif a<x:
            usable_moves.append("LR")
    elif b>y:
        usable_moves.append("L")
        if a>x:
            usable_moves.append("UL")
        elif a<x:
            usable_moves.append("LL")
    else:
        if a<x:
            usable_moves.extend(["LR","LL"])
        elif a>x:
            usable_moves.extend(["UL","UR"])
        
    return usable_moves
    
def printShortestPath(n, i_start, j_start, i_end, j_end):
    #  Print the distance along with the sequence of moves.
    return(1)

if __name__ == "__main__":
    n = int(input().strip())
    i_start, j_start, i_end, j_end = input().strip().split(' ')
    i_start, j_start, i_end, j_end = [int(i_start), int(j_start), int(i_end), int(j_end)]
    allowed_movements = allowable_moves([i_start, j_start], [i_end, j_end])
    moves_used= []
    up_downs = calc_y(i_start,i_end)
    if up_downs == "impossible":
        print("Impossible")
    else:
        ups = [s for s in allowed_movements if "U" in s or "D" in s][0]
        for i in range(up_downs):
            moves_used.append(ups)
            [i_start,j_start] = moving(ups, [i_start,j_start])
        left_rights = calc_y(j_start, j_end)
        if left_rights == "impossible":
            print("Impossible")
        else:
            if "L" in allowed_movements:
                for i in range(left_rights):
                    moves_used.append("L")
                [i_start,j_start] = moving("L", [i_start,j_start])
            elif "R" in allowed_movements:
                for i in range(left_rights):
                    moves_used.append("R")
                    moving("R", [i_start,j_start])
            print(up_downs+left_rights)
            for i in moves_used:
                print(i,end=" ")