C111123313331323113313331333133313331322331313312111133132212321   >>    C11112331333132311331333133313331333132233131331211113313221232   <<    C111123313331323113313331333133313331322331313312111133132212323   >>      C111123313331323113313331333133313331322331313312111133132212322   >>