InString:
	;input: $a0 = ptr to string 1
	;		$a1 = ptr to string 2
	;	assumes len($a1) <= len($a0)
	;out: $v0 = zero-based index where the second string is placed in the first.
	
	;clobbers: $t0,$t1
	subiu sp,sp,4		;set up a stack frame of 4 bytes.
	sw $a1,(sp)
	li $v0,0
InString_again:
	lbu $t0,($a0)
	nop
	beqz $t0,InString_terminated
	nop
	
	lbu $t1,($a1)
	nop
	beqz $t1,InString_terminated
	nop
	
	bne $t0,$t1,InString_noMatch
	nop
		b InString_overhead
		addiu $a1,1
		
InString_noMatch:
	lw $a1,(sp)		;reset the substring pointer if the letters don't match
	addiu $v0,1		;load delay slot
InString_overhead:
	addiu $a0,1
	b InString_Again
	nop
InString_terminated:
	addiu sp,sp,4
	jr ra
	nop