C111123313331323113313331333133313331323133112213331323112113233232321   >>    C11112331333132311331333133313331333132313311221333132311211323323232   <<    C111123313331323113313331333133313331323133112213331323112113233232323   >>      C111123313331323113313331333133313331323133112213331323112113233232322   >>