Error [Compare 3 number to show greater]

.MODEL SMALL
.STACK 100H

.DATA


NUM1 DB ?
NUM2 DB ?
NUM3 DB ?

MSG1 DB 10,13,"FIRST NUMBER : $"
MSG2 DB 10,13,"SECOND NUMBER : $"
MSG5 DB 10,13,"3RD NUMBER : $"
MSG3 DB 10,13,"GREATER $"
MSG4 DB 10,13,"SMALLER $"


.CODE
MAIN PROC

MOV AX,@DATA
MOV DS,AX


LEA DX,MSG1
MOV AH,9
INT 21H

MOV AH,1
INT 21H
MOV NUM1,AL

LEA DX,MSG2
MOV AH,9
INT 21H

MOV AH,1
INT 21H
MOV NUM2,AL


LEA DX,MSG5
MOV AH,9
INT 21H

MOV AH,1
INT 21H
MOV NUM3,AL


LEA DX,MSG3
MOV AH,9
INT 21H

MOV AL,NUM1

CMP AL,NUM2
JS L2


L1:
MOV AH,2
MOV DL,NUM1
INT 21H
JMP EXIT


L2:
MOV AL,NUM2
CMP AL,NUM3
JG L3


MOV AH,2
MOV DL,NUM2
INT 21H
JMP EXIT


L3:
MOV AH,2
MOV DL,NUM3
INT 21H
EXIT:


MOV AH,4CH
INT 21H

ENDS
END MAIN