C111123313331323113313331323133313331311331311331333133322232233131121132321   >>    C11112331333132311331333132313331333131133131133133313332223223313112113232   <<    C111123313331323113313331323133313331311331311331333133322232233131121132323   >>      C111123313331323113313331323133313331311331311331333133322232233131121132322   >>