请破解下方的栅栏密码：
Ioeolvyu（key=2）
A、我爱你
B、我想你
C、我恨你
D、对不起
LEOX寻找宝藏时，迷了路，现在有上下左右4个方向，这时他发现墙上有一些字：BEHIND THE1235831，下面用英语写着：THE KEY IS ON THE BOARD！请问现在他应该往哪个方向走？
My first letter is “z”.My second letter is in “key”，but not in “okay”.I'm the least in number 0-9.What am I?
What key can run itself?
答案是一个数字：
Key1
program area_; var base,height,area:real; begin write('base:'); readln(base); write('height:'); readln(height); area:=base*height/2; writeln('area:',area); end.
Key2 Line 154, Entry 3.
May the angels to guide your way
key1：Brad Silberling &Nicolas Cage
key2：city
key3：The Olympic Games
key4：The opening ceremony of the Olympic Games the very next day
key5：Baidu Encyclopedia
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