def isvalid(n): #checks whether n is valid

if dRez:#Checking if I need to update or insert new value

blt $t6,58,checkeq #checkeq to check equality of ints or chars inside $t3,$t6

#check if filename is empty, exit if it is.

if os.path.exists(dir_name) == 0: #checks if the directory exists

#check if filename is valid, exit if not

if (prev_dir == "leave") #Check to see if on the wrong level

#check input file

: #Check the question

#Check the question

case $answer #checks answer and performs functions depending