d={
  "p":["r", "r"],
  "s":["k", "s"],
  "k":["k", "p"],
  "r":["p", "s"]
}
input()
pb={"p", "s"}
for v in input().split(" "):
  if v=="-1":
    pb={d[x][k] for x in pb for k in [0, 1]}
  else:
    pb={d[x][int(v)] for x in pb}
print(pb)