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":
    t0={d[x][0] for x in pb}
    t1={d[x][1] for x in pb}
    pb=t0.union(t1)
    #Leidke tulemushulk 0 korral
    #Leidke tulemushulk 1 korral
    #ühendage tulemused pb-muutujasse
  else:
    pb={d[x][int(v)] for x in pb}
print(pb)