C11111211113313112113313331333133313231323223313113313232332111   >>    C1111121111331311211331333133313331323132322331311331323233211   <<    C11111211113313112113313331333133313231323223313113313232332113   >>      C11111211113313112113313331333133313231323223313113313232332112   >>