C111123313331323113313331323133313331333132331211113313331323133312121   >>    C11112331333132311331333132313331333133313233121111331333132313331212   <<    C111123313331323113313331323133313331333132331211113313331323133312123   >>      C111123313331323113313331323133313331333132331211113313331323133312122   >>