.data
    in: .space 20
    #Uppe
.text

main:
    li $t1,0
    li $v0, 8
    li $a1, 20

    la $a0, in

   # la $t0, in

    syscall
    li $v0, 4
    li $t0, 1

loop:
    lb   $a0,in($t0)
    beqz $a0,return
   # addi $t0,$t0,0
    addi $t1,$t1,1

addi $t0, $t0, 1
j loop



return:

    li   $v0,1
    add  $a0, $0,$t1
    syscall

    li   $v0,10
    syscall
    li $v0, 4

    la $a0, in
    syscall

    li $v0, 10
    syscall