.text
main:
	lb	$t0, x
	sub	$t0, $t0, 1
	sb	$t0, x

	li	$v0, 11
	lb	$a0, x
	syscall

	li	$v0, 11
	la	$a0, '\n'
	syscall

	li	$v0, 0		# return 0;
	jr	$ra

	.data
x:
	.byte	'Z'		# char x = 'Z';