C11111211113313112113313331333133313231323223313113313231333211121   >>    C1111121111331311211331333133313331323132322331311331323133321112   <<    C11111211113313112113313331333133313231323223313113313231333211123   >>      C11111211113313112113313331333133313231323223313113313231333211122   >>