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