C11112331333132311331333133313231333131133131113112211232322121   >>    C1111233133313231133133313331323133313113313111311221123232212   <<    C11112331333132311331333133313231333131133131113112211232322123   >>      C11112331333132311331333133313231333131133131113112211232322122   >>