from operator import itemgetter
n=int(input())
si,sj,ei,ej=map(int,input().split())
ui=si
uj=sj
check=0

path=[]
if abs(si-ei)%2==1:
    print("Impossible")
elif abs(sj-ej)%2==1 and si==ei: #odd horizontal
    print("Impossible")

else:    
    while True:
        c=0
        if uj==ej: #vertical
            c=1
            for i in range(abs(ui-ei)//4):
                if ei>ui:
                    path.append('LR')
                    path.append('LL')
                    ui=ui+4     
                else:
                    print("UR",end=" ")
                    print("UL",end=" ")
                    ui=ui-4       
                    
        if ui==ei: #horizontal
            c=1
            for i in range(abs(uj-ej)//2):
                if uj>ej:
                    path.append('L')
                    uj=uj-2
                    
                else:
                    path.append('R')
                    uj=uj+2
            
        if c==0: #other cases
            if ui<ei:
                if uj<ej:
                    path.append('LR')
                    uj+=1
                    ui+=2
                else:
                    path.append('LL')
                    uj-=1
                    ui+=2
            else:
                if uj<ej:
                    path.append('UR')
                    uj+=1
                    ui-=2
                else:
                    path.append('UL')
                    uj-=1
                    ui-=2
        if abs(ui-ei)==1 and abs(uj-ej)==1:
            check=1
        if abs(ui-ei)==1 and abs(uj-ej)==0:
            check=1
        if abs(ui-ei)==0 and abs(uj-ej)==1:
            check=1
        if abs(ui-ei)==2 and abs(uj-ej)==0:
            check=1    
        if ui>=n or uj>=n:
            check=1
        if ui==ei and uj==ej:
            break
        if check==1:
            break            
p=1
if check==0:
    pr=[]
    for i in path:
        if i=='UL':
            pr.append(1)
        if i=='UR':
            pr.append(2)
        if i=='R':
            pr.append(3)
        if i=='LR':
            pr.append(4)
        if i=='LL':
            pr.append(5)
        if i=='L':
            pr.append(6)
    spath=list(zip(pr,path))
    spath.sort(key=itemgetter(0))
            
    print(len(path) or "")
    for i in range(len(path)):
        print(spath[i][1],end=" ")
else:
    print("Impossible")