C111123313331323113313331333133313331323131211113313121111331333112331323211   >>    C11112331333132311331333133313331333132313121111331312111133133311233132321   <<    C111123313331323113313331333133313331323131211113313121111331333112331323213   >>      C111123313331323113313331333133313331323131211113313121111331333112331323212   >>