C111123313331323113313331333133313331323133112113313221232311111   >>    C11112331333132311331333133313331333132313311211331322123231111   <<    C111123313331323113313331333133313331323133112113313221232311113   >>      C111123313331323113313331333133313331323133112113313221232311112   >>