import random
a,b = map(int, input().split())

def get_hash(s, a, b):
    h = 0
    for i in range(len(s)):
        h = (h * a + s[i]) % b
    return h

for n in range(1, 10**6):
    S = [random.randint(97, 122) for _ in range(n)]
    S_hash = get_hash(S, a, b)
    for _ in range(10**6-n):
        T = [random.randint(97, 122) for _ in range(n)]
        if S_hash == get_hash(T, a, b) and S != T:
            ss = [chr(s) for s in S]
            print(''.join(ss))
            tt = [chr(t) for t in T]
            print(''.join(tt))
            break
    else:
        continue
    break