C111123313331323113313331333133313121111133112121111331323211232313111   >>    C11112331333132311331333133313331312111113311212111133132321123231311   <<    C111123313331323113313331333133313121111133112121111331323211232313113   >>      C111123313331323113313331333133313121111133112121111331323211232313112   >>