C111123313331323113313331333133313331323131211113313331323331323211   >>    C11112331333132311331333133313331333132313121111331333132333132321   <<    C111123313331323113313331333133313331323131211113313331323331323213   >>      C111123313331323113313331333133313331323131211113313331323331323212   >>