I am working on programming in MIPS but I don't understand this part. What does it mean and how can I implement this in program? How can I store the character into memory at label num?

3. Read in the 1 character from the user (use syscall 12) and store the character (sb) into memory at label num. Save this character value in a saved temporary register for later use. ? Which byte of num was overwritten, the least significant (0x41) or most significant (0x44)