from os import popen
from random import randint, choice, uniform

def gen():
	test = ""

	return test


cnt = 1000000
flag = False
f1 = open("test.in", "w")
for i in range(cnt):
    f = open("TASK.in", "w")
    test = gen()
    f.write(test)
    f.close()
    v1 = popen("stupid.exe < TASK.in").read()
    v2 = popen("run.exe < TASK.in").read()
    if i % 100 == 0 and i:
        print(i)
    if v1 != v2 and v1 + '\n' != v2 and v2 + '\n' != v1:
        flag = True
        f1.write(test)
        break
if not flag:
    f1.write("Not Found")
f1.close()