n = int(input())
p = list(map(int, input().split()))
ans = []
tgt = list(range(n))
at = 0
while p != tgt and at != 0:
    if at == n - 1:
        ans.append('S')
        at = 0
    else:
        if p[at] > p[at+1]:
            ans.append('R')
            p[at], p[at+1] = p[at+1], p[at]
        ans.append('S')
        at += 1
print(''.join(ans))