Takes a null terminated (C-Style) string and returns another C-style string only containing valid characters. Valid characters are defined to be alphanumeric characters (a-A,b-B,0-9) # and "_" (underscore) character. $a0 : pointer to input string buffer; $a1 : pointer to output string buffer (initially all zeros)

Write a Mips code below

valid_id:

jr $ra