C111123313331323113313331333133313331322331313312111133112113313223321   >>    C11112331333132311331333133313331333132233131331211113311211331322332   <<    C111123313331323113313331333133313331322331313312111133112113313223323   >>      C111123313331323113313331333133313331322331313312111133112113313223322   >>