[The programmer]
Mr X is learning how to program,but he is having trouble finding out the flag. Help him out by doing it for him. Here is his assignment pseudocode:

//What is this? i don't quite understand. Look like array, but not sure what it is.
a = [0-9 + a-z]

index = 0

for i in len(a):
    if(index is even)
        flag += chr(ord(i) + 5)
    else
        flag += chr(ord(i) - 2)

    index = index + 1

//I need to know the output of flag
print flag