#include <bits/stdc++.h>
using namespace std;
const int maxn = 310;
int n, a[maxn];
int main() {
  scanf("%d", &n);
  for (int i = (1); i <= (n); ++i) scanf("%d", &a[i]);
  for (int i = (1); i <= (n - 1); ++i) {
    for (int j = (1); j <= (a[i]); ++j) printf("PRL");
    printf("R");
  }
  for (int j = (1); j <= (a[n]); ++j) printf("LRP");
}
