C11111211113313112113313331333131133133313222313331333132313221221   >>    C1111121111331311211331333133313113313331322231333133313231322122   <<    C11111211113313112113313331333131133133313222313331333132313221223   >>      C11111211113313112113313331333131133133313222313331333132313221222   >>