C111123313331323113313331333133313331323132333133313222313112121   >>    C11112331333132311331333133313331333132313233313331322231311212   <<    C111123313331323113313331333133313331323132333133313222313112123   >>      C111123313331323113313331333133313331323132333133313222313112122   >>