C111123313331323113313331323133313331311331311331311221123232211   >>    C11112331333132311331333132313331333131133131133131122112323221   <<    C111123313331323113313331323133313331311331311331311221123232213   >>      C111123313331323113313331323133313331311331311331311221123232212   >>