C22121333132313311211113313331333131133133313331333133313223323211   >>    C2212133313231331121111331333133313113313331333133313331322332321   <<    C22121333132313311211113313331333131133133313331333133313223323213   >>      C22121333132313311211113313331333131133133313331333133313223323212   >>