la $t1, string2
li $t8, 78
sb $t8, 0($t1)
li $t8, 79
sb $t8, 1($t1)
li $t8, 32
sb $t8, 2($t1)
li $t8, 76
sb $t8, 3($t1)
li $t8, 65
sb $t8, 4($t1)
li $t8, 32
sb $t8, 5($t1)
li $t8, 80
sb $t8, 6($t1)
li $t8, 79
sb $t8, 7($t1)
li $t8, 78
sb $t8, 8($t1)
li $t8, 69
sb $t8, 9($t1)
li $t8, 83
sb $t8, 10($t1)
li $t8, 32
sb $t8, 11($t1)
li $t8, 77
sb $t8, 12($t1)
li $t8, 65
sb $t8, 13($t1)
li $t8, 83
sb $t8, 14($t1)
li $t8, 0
sb $t8, 15($t1)