ex3_12.asm

data segment
	string1		db	'Hello - Wor ld    !',0
data ends

stack1	segment para stack
			dw	10h		dup(0)
stack1 ends

codeseg	segment
start:
	assume cs:codeseg, ds:data, ss:stack1
	mov		ax,		data
	mov		ds,		ax

	mov		di,		offset string1
outlp:
	cmp		byte ptr [di],	0	
	jz done
again:
	cmp		byte ptr [di],	' '
	jnz	next
	mov		si,		di
inlp:
	inc	si
	mov		ah,		[si]
	mov		[si-1],	ah
	cmp		byte ptr [si],	0
	jnz inlp
	jmp again
next:
	inc di
	jmp outlp
done:
	mov		byte ptr [di],	'$'
	mov		dx,		offset string1
	mov		ah,		09h
	int 21h
	mov		ah,		4ch
	int 21h

codeseg ends
	end start