C1111233131211111211113313331333133313331322322331333112113233321   >>    C111123313121111121111331333133313331333132232233133311211323332   <<    C1111233131211111211113313331333133313331322322331333112113233323   >>      C1111233131211111211113313331333133313331322322331333112113233322   >>