"""
import random
import sys
t=int(input())
while t:
    t-=1
    n=int(input())
    a=int(input())
    s=int(random.uniform(1,(5*10^n)))
    print(s)
    b=int(input())
    c=int(random.uniform(0,(10^n)))
    print(c)
    d=int(input())
    e=int(random.uniform(0,(10^n)))
    print(e)
    x=int(input())
    if x==-1:
        break
    stdout.flush()
"""
from sys import stdout

print("abc")
stdout.flush()
print("xyz")