Code not working, need help to print output,

#Enter three characters:

#Displays them in reverse order

.data

s1: .asciiz "Enter three characters: "

s2: .asciiz "Your characters in reverse order: "

char: .space 3

.text

li $v0, 4 #system call code fot print_str

la $a0, s1 #printing on screen s1

syscall

li $v0, 8 #system call code for reading from keyboard the three chars

la $a0, char

li $a1, 4

syscall

li $v0, 11 #system call code for creating a new line

la $a0, ' '

syscall

li $v0, 4 #displays second string

la $a0, s2

syscall

la $t0, char

li $v0, 11 #prints 3rd char, this part is not working. I dont know why. Is there a better way to access the characters in the string?

lb $a0, 3($t0)

syscall

lb $a0, 2($t0) #prints 2nd char

syscall

lb $a0, ($t0) #prints 1st char

syscall

Q1. Write a MIPS program that prompts the user to enter 3 characters and then displays them in reverse order. Sample run nter three characters: xyz Your characters in reverse order zyx