def lovushka(s, m, n):
    if m != 0:
        s = s + '0'
        lovushka(s, m - 1, n)
        s = s[:-1:]
    if n != 0:
        s = s + '1'
        lovushka(s, m, n - 1)
        s = s[:-1]
    if m + n == 0:
        ans.append(s)


m, n = map(int, input().split())
ans = []
lovushka("", m, n)
print(ans)