ORG 100H
.MODEL SMALL
.DATA
msg_1 db "Enter the first character: $"
msg_2 db  "Enter the second character: $" 
msg_3 db  "In alphaphet order: $"
next db 0dh,0ah,"$"
.code
main proc
    mov ax,@data
    mov ds,ax
    
    mov ah,9
    lea dx,msg_1
    int 21h
    
    mov ah,1
    int 21h
    
    mov bl,al
    
    mov ah,9
    lea dx,next
    int 21h 
    
    lea dx,msg_2
    int 21h 
    
    mov ah,1
    int 21h
    
    mov bh,al
    
    mov ah,9
    lea dx,next
    int 21h
    
    cmp bh,bl
    
    jae larger
    mov ah,2
    mov dl,bh
    int 21h
    
    mov dl,bl
    int 21h
    ret
    larger:
      mov ah,2
    mov dl,bl
    int 21h 
    
    
     mov dl,bh
    int 21h 
    main endp
end main