'''
#4-1
n=eval(input(" "))
n=n+1
s=0
for i in range(1,n):
s=s+i*i
print(s)
'''
'''
#4-2
n=2*eval(input(""))
s=0
for i in range(1,n,2):
s=s+i
print(s)
'''
'''
#4-3
n=eval(input(""))
sum=0
a=1
b=2
for i in range(n):
sum=sum+b/a
a,b=b,a+b
print(n,sum)
'''
#4-4
import random
n=eval(input())
random.seed(n)
str="ABCDEFGHIJ0123456789"
for i in range(6):
print(random.choice(str),end='')
