ass1

.model small
.data

 A db ?
 B db ?


.code

main proc
    mov ah,1
    int 21h

    mov A,al
    int 21h

    mov B,al
    mov bh,A
    sub bh,B
    add bh,48

    mov ah,2
    mov dl,0ah ;new line
    int 21h

    mov dl,0dh ;remove space
    int 21h

    mov dl,bh
    int 21h

    main endp


end main