choose_art

art = ['1ygb', '2gbw', '3ybg', '4mbg', '5bgy', '6grb', '7yrg', '8grm', '9owy']


def pick_art(a):
    t = 0
    for e in a:
        if e in "ryb":
            t += 1
    if t == 1:
        return a[0]


to_client = list(filter(None, map(pick_art, art)))
print(f'Artworks {", ".join(to_client)} can be shown to client')