C1111233131211111211113313331333133313231323331323131133112331322211   >>    C111123313121111121111331333133313331323132333132313113311233132221   <<    C1111233131211111211113313331333133313231323331323131133112331322213   >>      C1111233131211111211113313331333133313231323331323131133112331322212   >>