C1111233131211111211113313331333133313331333133313331323133313331123221211   >>    C111123313121111121111331333133313331333133313331333132313331333112322121   <<    C1111233131211111211113313331333133313331333133313331323133313331123221213   >>      C1111233131211111211113313331333133313331333133313331323133313331123221212   >>