C11111211113313112113313331333133313331333132212111133133313331323123222211   >>    C1111121111331311211331333133313331333133313221211113313331333132312322221   <<    C11111211113313112113313331333133313331333132212111133133313331323123222213   >>      C11111211113313112113313331333133313331333132212111133133313331323123222212   >>