N = int(input())
S = input()

A = []
if S[0] == "o":
    A.append(1)
else:
    A.append(0)
for i in range(N-1):
    A.append(0 if S[i] == S[i+1] else 1)
if S[-1] == "o":
    A.append(1)
else:
    A.append(0)

def func(A):
    ans = []
    for i in range(1, N):
        if A[i] == 0:
            A[i+1] ^= 1
            A[0] ^= 1
            ans.append("L")
        else:
            A[i] ^= 1
            A[-1] ^= 1
            ans.append("R")
    return A, ans

B = A[:]
A[0] ^= 1
A[1] ^= 1
B[0] ^= 1
B[-1] ^= 1

C, opC = func(A)
opC = ["L"]+opC
D, opD = func(B)
opD = ["R"]+opD
C[0] ^= 1
C[-1] ^= 1
D[0] ^= 1
D[-1] ^= 1

if C.count(0) == len(C):
    print("Yes")
    print("".join(opC))
elif D.count(0) == len(D):
    print("Yes")
    print("".join(opD))
else:
    print("No")