Example $3$:

$1$: $.$data

$2$: str$1$ BYTE "AAAX",$0$

$3$: str$2$ BYTE $10$ DUP$(0$FFh$)$

$4$: $.$code

$5$: mov edi,$0$

$6$: L$1$: mov al$,[$str$1+$edi$]$

$7$: cmp al$,0$

$8$: je L$2$

$9$: mov $[$str$2+$edi$],$al

$10$: inc edi

$11$: jmp L$1$

$12$: L$2$:

After Example $3$ executes, what value will be stored at offset $[$str$2+4]?$