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data2 db 50,?,50 dup('$') string db 'yes$' string1 db 'no$' data ends

assume cs:code,ds:data code segment start: mov ax,data mov ds,ax

mov dx,offset data2+2 mov ah,09h int 21h

mov ah,2h mov dl,0ah int 21h

mov ah,2h

mov ah,0ah mov dx,offset data2 int 21h

mov ah,2h mov dl,0ah int 21h

mov ah,2h mov dl,0dh int 21h

mov dl,0dh int 21h

mov al,0h mov cx,47 mov di,0

again: mov al,[di+2] cmp al,61h

next: add di,1 loop again

mov dx,offset string1 mov ah,09h int 21h

jmp endcode

mov dx,offset string

yes:

jnz next mov al,[di+3] cmp al,73h jnz next mov al,[di+4] cmp al,6dh jnz next jmp yes

mov ah,09h int 21h

endcode: mov ax,4c00h int 21h code ends end start

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