from collections import deque

N = int(input())
A = deque(map(int, input().split()))

ans = []

while A != deque([*range(N)]):
    if 0 not in (A[0], A[1]) and A[0] > A[1]:
        A[0], A[1] = A[1], A[0]
        ans.append("S")
    else:
        A.append(A.popleft())
        ans.append("R")

print(*ans, sep="")