C111123313331323113313331333133313331122112312111133131133132313331322121331   >>    C11112331333132311331333133313331333112211231211113313113313231333132212133   <<    C111123313331323113313331333133313331122112312111133131133132313331322121333   >>      C111123313331323113313331333133313331122112312111133131133132313331322121332   >>