C11111211113313112113313331333133313331333131211113313232233132321231   >>    C1111121111331311211331333133313331333133313121111331323223313232123   <<    C11111211113313112113313331333133313331333131211113313232233132321233   >>      C11111211113313112113313331333133313331333131211113313232233132321232   >>