.model small
.stack 64h
.data
        msg db"Input a letter:$"
	msg1 db"Output:$"
	msga db"a$"
	msgb db"ab$"
	msgc db"abc$"
.code
	
   main:
	mov ax,@data
	mov ds,ax

	mov ah,0003h
	int 10h

	lea dx,msg
	mov ah,09h
	int 21h
	
	mov ah,01h
	int 21h

	mov bh,al
	int 21h
	
	lea dx,msg1
	mov ah,09h
	int 21h
	jmp a
   a:
	cmp bh,"a"
	int 21h
	je aprint
	jne b
   aprint:
	lea dx,msga
	mov ah,09h
	int 21h
	jmp close
   b:
	cmp bh,"b"
	int 21h
	je bprint
	jne c
   bprint:
	lea dx,msgb
	mov ah,09h
	int 21h
	jmp close
   c:
	cmp bh,"b"
	int 21h
	je cprint
	jne c

   cprint:
	lea dx,msgc
	mov ah,09h
	int 21h
	jmp close	
	
   close:
	mov ah,4ch
	int 21h
end main

PLLLLS SOLVE THIS ONE!I'm trying to make a program that give me a output of "abc" if i type c,"abcd" if i type d,"a" if i type a

Assembler