print(please enter a 2 digit number)
scan(int)
if int is between 9 to 100
    if  int is odd
        add 1 to first digit of integer
        add 1 to second digit of integer
        print integer
    else
        subtract 1 to first digit of integer
        subtract 1 to second digit of integer
        print integer
else
    print(please enter a 2 digit number)