N = int(input())
S = input()
li = list(S)
z = (0 if S[0] == "o" else 1)
ans = []
l = ord("A")
for i in S:
    if z:
        z = 0
    else:
        z = 1
    if l != ord(i):
        if z:
            z = 0
        else:
            z = 1
    ans.append("R" if z == 1 else "L")
    l = ord(i)

# 再現
li1 = li[:]
L = ans.count("L")
R = ans.count("R")
for i in range(N):
    if L % 2 == 1:
        if li[i] == "o":
            li[i] = "x"
        else:
            li[i] = "o"
    if ans[i] == "L": L -= 1
for i in range(N-1, -1, -1):
    if R % 2 == 1:
        if li[i] == "o":
            li[i] = "x"
        else:
            li[i] = "o"
    if ans[i] == "R": R -= 1

if li.count("x") == 0:
    print("Yes")
    print("".join(ans))

# 再現
ans = ["L" if i == "R" else "R" for i in ans]
L = ans.count("L")
R = ans.count("R")
for i in range(N):
    if L % 2 == 1:
        if li1[i] == "o":
            li1[i] = "x"
        else:
            li1[i] = "o"
    if ans[i] == "L": L -= 1
for i in range(N-1, -1, -1):
    if R % 2 == 1:
        if li1[i] == "o":
            li1[i] = "x"
        else:
            li1[i] = "o"
    if ans[i] == "R": R -= 1

if li1.count("x") == 0:
    print("Yes")
    print("".join(ans))
else:
    print("No")