Integrated Circuits Used
Description
 not working for 9+9 
 Procedure
- Add IC 74LS83 into ICBase-1 (74LS83).
 - Add IC 74LS83 into ICBase-2 (74LS83).
 - Add IC 74LS32 into ICBase-3 (74LS32).
 - Add IC 74LS08 into ICBase-4 (74LS08).
 - Connect Pin-16 (Ground) of ICBase-1 (74LS83) to GND Port.
 - Connect VCC Port to Pin-5 (VCC) of ICBase-1 (74LS83).
 - Connect Pin-16 (Ground) of ICBase-2 (74LS83) to GND Port.
 - Connect Pin-5 (VCC) of ICBase-2 (74LS83) to VCC Port.
 - Connect Pin-14 (Input) of ICBase-1 (74LS83) to Input-0.
 - Connect Pin-8 (Input) of ICBase-1 (74LS83) to Input-1.
 - Connect Pin-3 (Input) of ICBase-1 (74LS83) to Input-2.
 - Connect Pin-1 (Input) of ICBase-1 (74LS83) to Input-3.
 - Connect Pin-15 (Input) of ICBase-1 (74LS83) to Input-4.
 - Connect Pin-7 (Input) of ICBase-1 (74LS83) to Input-5.
 - Connect Pin-4 (Input) of ICBase-1 (74LS83) to Input-6.
 - Connect Pin-20 (Input) of ICBase-1 (74LS83) to Input-7.
 - Connect Pin-14 (Input) of ICBase-2 (74LS83) to Pin-13 (Output) of ICBase-1 (74LS83).
 - Connect Pin-6 (Output) of ICBase-1 (74LS83) to Pin-8 (Input) of ICBase-2 (74LS83).
 - Connect Pin-3 (Input) of ICBase-2 (74LS83) to Pin-2 (Output) of ICBase-1 (74LS83).
 - Connect Pin-1 (Input) of ICBase-2 (74LS83) to Pin-19 (Output) of ICBase-1 (74LS83).
 - Connect Pin-1 (Input) of ICBase-4 (74LS08) to Pin-2 (Output) of ICBase-1 (74LS83).
 - Connect Pin-2 (Input) of ICBase-4 (74LS08) to Pin-19 (Output) of ICBase-1 (74LS83).
 - Connect Pin-4 (Input) of ICBase-4 (74LS08) to Pin-6 (Output) of ICBase-1 (74LS83).
 - Connect Pin-5 (Input) of ICBase-4 (74LS08) to Pin-19 (Output) of ICBase-1 (74LS83).
 - Connect Pin-1 (Input) of ICBase-3 (74LS32) to Pin-3 (Output) of ICBase-4 (74LS08).
 - Connect Pin-2 (Input) of ICBase-3 (74LS32) to Pin-6 (Output) of ICBase-4 (74LS08).
 - Connect Pin-7 (Input) of ICBase-2 (74LS83) to Pin-3 (Output) of ICBase-3 (74LS32).
 - Connect Pin-4 (Input) of ICBase-2 (74LS83) to Pin-3 (Output) of ICBase-3 (74LS32).
 - Connect Pin-20 (Input) of ICBase-2 (74LS83) to GND Port.
 - Connect Pin-15 (Input) of ICBase-2 (74LS83) to GND Port.
 - Connect Pin-13 (Output) of ICBase-2 (74LS83) to Output-0.
 - Connect Pin-6 (Output) of ICBase-2 (74LS83) to Output-1.
 - Connect Pin-2 (Output) of ICBase-2 (74LS83) to Output-2.
 - Connect Pin-19 (Output) of ICBase-2 (74LS83) to Output-3.
 - Connect Output-4 to Pin-3 (Output) of ICBase-3 (74LS32).
 - Connect Pin-7 (Ground) of ICBase-4 (74LS08) to GND Port.
 - Connect Pin-20 (VCC) of ICBase-4 (74LS08) to VCC Port.
 - Connect Pin-20 (VCC) of ICBase-3 (74LS32) to VCC Port.
 - Connect Pin-7 (Ground) of ICBase-3 (74LS32) to GND Port.
 - Connect Seven segment display 1 to Pin-13 (Output) of ICBase-2 (74LS83).
 - Connect Seven segment display 1 to Pin-6 (Output) of ICBase-2 (74LS83).
 - Connect Seven segment display 1 to Pin-2 (Output) of ICBase-2 (74LS83).
 - Connect Seven segment display 1 to Pin-19 (Output) of ICBase-2 (74LS83).
 - Connect Pin-4 (Input) of ICBase-3 (74LS32) to Pin-18 (Output) of ICBase-1 (74LS83).
 - Connect Pin-5 (Input) of ICBase-3 (74LS32) to Pin-3 (Output) of ICBase-3 (74LS32).
 - Connect Seven segment display 2 to Pin-6 (Output) of ICBase-3 (74LS32).
 - Connect GND Port to ICBase-1 (74LS83).
 - Connect VCC Port to ICBase-1 (74LS83).
 - Connect Input-1 to ICBase-1 (74LS83).
 - Connect Pin-8 (Input) of ICBase-2 (74LS83) to ICBase-1 (74LS83).
 - Connect Pin-1 (Input) of ICBase-2 (74LS83) to ICBase-1 (74LS83).
 - Connect GND Port to ICBase-2 (74LS83).
 - Connect Output-0 to ICBase-2 (74LS83).
 - Connect GND Port to ICBase-3 (74LS32).