# Enter your code here. Read input from STDIN. Print output to STDOUT

m = {"UL": (-2,-1), "UR": (-2,1), "R": (0,2), "LR": (2,1), "LL": (2,-1), "L": (0,-2)}

n = int(raw_input())
p = map(int, raw_input().split())

s,e = p[:2],p[2:]
v = set()
v.add((p[0],p[1]))

s = [["",[s]]]
ans = ["Impossible"]
while s:
    s_ = []
    for k_ in s:
        #print k_
        i_,j_ = k_[1][-1]
        for k in ["UL", "UR", "R", "LR", "LL", "L"]:
            i,j = m[k]
            x,y = i_+i, j_+j
            if [x,y] == e:
                ans.append(k_[0] + " " + k)
                s_ = []
                break
            if 0 <= x <= n and 0 <= y <= n and (x,y) not in v:
                v.add((x,y))
                s_.append([k_[0] + " " + k,k_[1] + [[x,y]]])
    if len(ans) > 1 or s_ == []:
        break
    s = s_
    
if len(ans) == 1:
    print ans[0]
else:
    order = ["UL", "UR", "R", "LR", "LL", "L"]
    ans = [x.strip().split() for x in ans[1:]]
    #print ans
    ans_ = ["".join(str(order.index(x)) for x in w) for w in ans]
    ind = ans_.index(min(ans_))
    print len(ans[ind])
    print " ".join(ans[ind])
    #print len(ans.strip().split())
    #print ans.strip()