hi Mohamed, whole circuit, for two input same as a half adder circuit in digital logic design, SUM (A ex-or B) and CARRY (A and B).
e.g. if A=0110, and B=1011 the output is SUM=1101(EX-OR logic) and carry=0010(AND logic). and in my circuit, i took two user-defined sequences as input and an output section upper portion as SUM and lower section as CARRY.