C111123313331323113313331333133313331122112312111133131133132313331311331312321   >>    C11112331333132311331333133313331333112211231211113313113313231333131133131232   <<    C111123313331323113313331333133313331122112312111133131133132313331311331312323   >>      C111123313331323113313331333133313331122112312111133131133132313331311331312322   >>