C111123313331323113313331333133313331323131211113313331322232131121   >>    C11112331333132311331333133313331333132313121111331333132223213112   <<    C111123313331323113313331333133313331323131211113313331322232131123   >>      C111123313331323113313331333133313331323131211113313331322232131122   >>