#!/bin/python3

def main_shifting(x1,y1,c):
    #print(c)
    moves = ['UL', 'UR', 'R', 'LR', 'LL', 'L']
    if(x1 - x2 == 1 or x2 - x1 == 1):
        print ("Impossible")
    elif(x1 == x2 and y1 == y2):
        print (steps)
        for i in range(len(positionstack)):
            print(positionstack[i], end = " ")
    else:
        if(x1,y1) not in trackingstack:
            #print("position push:")
            trackingstack.append((x1,y1))
        #print(trackingstack)
        if(x1 == x2):
            if(y1 - y2 == 1 or y2 - y1 == 1):
                print ("Impossible")
            elif(y1 > y2):
                shiftposition(moves[5],x1,y1)
            elif(y2 > y1):
                shiftposition(moves[2],x1,y1)
        else:    
            shiftposition(moves[c],x1,y1)            
def shiftposition(position,a,b):
    global count
    global steps
    #print("position:"+position)
    if(position ==  'L'):
        c = a
        d = b - 2
    elif(position =='R'):
        c = a
        d = b + 2
    elif(position =='UL'):
        c = a - 2
        d = b - 1
    elif(position =='UR'):
        c = a - 2
        d = b + 1
    elif(position =='LL'):
        c = a + 2
        d = b - 1
    elif(position =='LR'):
        c = a + 2
        d = b + 1
    if(count < 5):    
        if(c < 0 or c >= n or d < 0 or d >= n ):
            count = count +1
            main_shifting(a,b,count)
        else:
            count = 0
            #trackingstack.append((c,d))
            positionstack.append(position)
            steps = steps + 1
            #print("trackingstack:" ,trackingstack)
            main_shifting(c,d,count)
if __name__ == "__main__":
    n = int(input().strip())
    global x1,y1,x2,y2 , trackingstack, positionstack 
    x1,y1,x2,y2 = input().strip().split(' ')
    x1,y1,x2,y2 = int(x1),int(y1),int(x2),int(y2)
    #print (x1,y1,x2,y2)
    trackingstack = []
    positionstack = []
    global count,steps
    steps = int(0)
    count = int(0)
    main_shifting(x1,y1,0)