C11111211113313112113313331333133313331333132313231333133313331323221121   >>    C1111121111331311211331333133313331333133313231323133313331333132322112   <<    C11111211113313112113313331333133313331333132313231333133313331323221123   >>      C11111211113313112113313331333133313331333132313231333133313331323221122   >>