def encode(S):
    X=0
    p=1
    for m in S[::-1]:
        X+=ord(m)*p; X%=b
        p*=a; p%=b
    return X

from string import ascii_lowercase as K
from itertools import product

a,b=map(int,input().split())
M={}
for S in product(K,repeat=4):
    S="".join(S)
    code=encode(S)
    if code in M:
        print(S)
        print(M[code])
        exit()
    M[code]=S