C1111233131211111211113313331333133313332313113313331322331322233211331   >>    C111123313121111121111331333133313331333231311331333132233132223321133   <<    C1111233131211111211113313331333133313332313113313331322331322233211333   >>      C1111233131211111211113313331333133313332313113313331322331322233211332   >>