C11111211113313112113313331333133313133313232233133313231323133321121   >>    C1111121111331311211331333133313331313331323223313331323132313332112   <<    C11111211113313112113313331333133313133313232233133313231323133321123   >>      C11111211113313112113313331333133313133313232233133313231323133321122   >>