C11111211113313112113313331333133313331313222313113313232111221   >>    C1111121111331311211331333133313331333131322231311331323211122   <<    C11111211113313112113313331333133313331313222313113313232111223   >>      C11111211113313112113313331333133313331313222313113313232111222   >>