Suppose your uncle is working in Maryland, USA. You want him to buy you some CDs to help you with your English. Now you're calling your uncle using the IP card.

You dial（拔打）17901.

Operator: Please choose which language you want:1. Chinese;  2. English.

You dial 2．

Operator: Please input your account number（卡号）, then press the pound sign (#字键)．

You dial 880623445535, then press the pound sign.

Operator: Please enter your PIN（密码）．

You dial 4654.

Operator: Please enter the number you wish to call, then press the pound sign.

You dial 001 301 4163478(your uncle's phone number) and press the pound sign.

下列字母A~E分别代表你拨打IP卡电话的其中一个步骤，请按拨打IP卡电话的先后顺序，在横线上填写相应的字母。