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|            |
   A4| 1        16|   B4
   S3| 2        15|   S4
   A3| 3        14| COUT
   B3| 4        13|  CIN
  VCC| 5        12|  GND
   S2| 6        11|   B1
   B2| 7        10|   A1
   A2| 8         9|   S1
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