C11111211113313112113313331333131133133313222313331333132212111   >>    C1111121111331311211331333133313113313331322231333133313221211   <<    C11111211113313112113313331333131133133313222313331333132212113   >>      C11111211113313112113313331333131133133313222313331333132212112   >>