C111123313121111121111331333133313331323112113313232233132222211   >>    C11112331312111112111133133313331333132311211331323223313222221   <<    C111123313121111121111331333133313331323112113313232233132222213   >>      C111123313121111121111331333133313331323112113313232233132222212   >>