Mips make string with integers and chars

Question

I'm very very new to mips. I'm not sure where to start with this:

let's say I have

li $t1, -3
li $t2, -9

I want to print a string that is

(-3,-9)

What data structure do I store this in? .byte? .space?

This is what I have so far, it prints out "(,)"; Am I on the right track? Where do I go from here?

string: .space 10


    .text
    .globl main

main:   la  $t0, string

    li $t1, -3
    li $t2, -9
    li $t3, '('
    li $t4, ',' 
    li $t5, ')'
    li $t6, '-'
    
        
    sb $t3, ($t0)
    
    sb $t4, 1($t0)
    
    sb $t5, 2($t0)
    
    
    j exit
    

exit:
    li  $v0, 4      # print the string
        la  $a0, string
        syscall

        li $v0, 10      # terminate program
        syscall