#!/usr/bin/env python3
import sys

def ask(s):
    print("\x1B[1m" + s + "\x1B[0m: ", end="")
    return int(input())

A = sys.argv[1]
if len(A) == 3:
    if "r" not in A:
        print("second")
    elif A[-1] == "w":
        print("last")
    elif A.count("b") > 1:
        print("last blue")
    else:
        print("last")

elif len(A) == 4:
    if A.count("r") > 1 and ask("last digit serial number") % 2 == 1:
        print("last red")
    elif A[-1] == "g" and "r" not in A:
        print("first")
    elif A.count("b") == 1:
        print("first")
    elif A.count("g") > 1:
        print("last")
    else:
        print("second")

elif len(A) == 5:
    if A[-1] == "z" and ask("last digit serial number") % 2 == 1:
        print("fourth")
    elif A.count("r") == 1 and A.count("g") > 1:
        print("first")
    elif "z" not in A:
        print("second")
    else:
        print("first")

elif len(A) == 6:
    if "g" not in A and ask("last digit serial number") % 2 == 1:
        print("third")
    elif A.count("g") == 1 and A.count("w") > 1:
        print("fourth")
    elif "r" not in A:
        print("last")
    else:
        print("fourth")