C11111211113313112113313331333131133133313331333132233133313122211   >>    C1111121111331311211331333133313113313331333133313223313331312221   <<    C11111211113313112113313331333131133133313331333132233133313122213   >>      C11111211113313112113313331333131133133313331333132233133313122212   >>