# p=1000000000000000003
# b=123456789987654321

# n=32

# mat=[[0]*n for _ in range(n)]
# for i in range(n-1):
#     mat[i][i]=-b
#     mat[i][i+1] = 1
# mat[n-1][0]=p

# res=Matrix(mat).LLL()[0]

# s=[]
# t=[]
# for i in range(n):
#     if res[i]>=0:
#         s.append(chr(ord('a')+res[i]))
#         t.append('a')
#     else:
#         t.append(chr(ord('a')-res[i]))
#         s.append('a')
# s=''.join(s)
# t=''.join(t)

# hs=0
# ht=0
# for i in range(n):
#     hs+=ord(s[i])*(b**i)
#     ht+=ord(t[i])*(b**i)
# hs%=p
# ht%=p
# assert hs==ht

# print(s[::-1])
# print(t[::-1])

print('abbaaaaaaabaabaaabbdabababaabcaa')
print('aaaaabbbbaabaaaaaaaaaababaabaaba')