C11111211113313112113313331333133313231311331333133313231333133112113331132211   >>    C1111121111331311211331333133313331323131133133313331323133313311211333113221   <<    C11111211113313112113313331333133313231311331333133313231333133112113331132213   >>      C11111211113313112113313331333133313231311331333133313231333133112113331132212   >>