full subtractor

For making a FULL SUBTRACTOR, we need 2 - HALF SUBTRACTOR. COMPONENTS USED:- 1) 2 - XOR GATE. 2) 2 - AND GATE. 3) 2 - NOT GATE(INVERTER). 4) 1 - OR GATE. 5) 3 - INPUTS(A,B, CARRY_IN). 6) 2 - OUTPUTS(DIFFERENCE, CARRY_OUT). 7)GROUND.