.MODEL SMALL
.STACK 200H
.DATA
Text db "Baka coding desu$"
ResultText db "$"
.CODE
START:

mov ax, @DATA
mov ds, ax

lea dx, Text
xor ax, ax
mov ah, 09
int 21h

xor dx, dx
xor si, si
Parse_Text_loop:
mov al, [Text + si]

mov bx, si
sub si, dx
mov [ResultText + si], al
mov si, bx

cmp al, '$'
je End_Parse_text_loop

cmp al, 'g'
jne Continue_parse_Text_loop
mov ah, [Text + si + 1]
cmp ah, '$'
je Cmp_ah_n
cmp ah, ' '
jne Continue_parse_Text_loop
Cmp_ah_n:
mov ah, [Text + si - 1]
cmp ah, 'n'
jne  Continue_parse_Text_loop
mov ah, [Text + si - 2]
cmp ah, 'i'
jne Continue_parse_Text_loop
mov bx, si
sub si, dx
mov [ResultText + si], ' '
mov [ResultText + si - 1], 'd'
mov [ResultText + si - 2], 'e'
mov si, bx
inc dx

Continue_parse_Text_loop:

inc si
jmp Parse_Text_loop

End_Parse_text_loop:
; ------ new line
mov dl, 0dh
mov ah, 02h
int 21h
mov dl, 0ah
mov ah, 02h
int 21h
; ------

lea dx, ResultText
xor ax, ax
mov ah, 09
int 21h

mov ah, 4ch
mov al, 00h
int 21h

END START