#
# Validator.py
#
import os
import glob

def asrt(check, message):
    if not check:
        print(message)
        exit(0)

n = input()
asrt(2 <= int(n) <= 1000000, "N not good")

three_val = input().split(" ")

asrt(0 <= float(three_val[0]) <= 1, "p not good")
asrt(0 <= float(three_val[1]) <= 1, "q not good")
asrt(0 <= float(three_val[2]) <= 1, "r not good")

s = input()

asrt(len(s) == int(n), "expect " + n + " actual " + str(len(s)))

print("ALL OK!")