PUSH CX PUSH DX AND DL,0f0h MOV CL,4 SHR DL,CL CMP DL,0ah JB s1

ADD DL,07h s1: ADD DL,30h MOV AH,2 INT 21h POP DX AND DL,0fh CMP DL,0ah JB s2

ADD DL,07h s2: ADD DL,30h MOV AH,2 INT 21h INC BX MOV DL,',' MOV AH,2 INT 21h POP CX LOOP output