C11111211113313112113313331333131133133313223221211111323323221   >>    C1111121111331311211331333133313113313331322322121111132332322   <<    C11111211113313112113313331333131133133313223221211111323323223   >>      C11111211113313112113313331333131133133313223221211111323323222   >>