海伦有一位老师。她在海伦的手上画字母，并教她拼写。
Helen had a teacher. She drew letter in Helen's hand and taught her to spell.
第二位字母6代表：防止大浪的入侵。
The second letter 6 representative: to prevent the invasion of the big wave.
商家的钱包 ：你的钱包编号由一个字母和12位（见上文） 。
Merchant's purse : your purse ID consisting of a letter and twelve digits (see above).
将a换位密码的首字母，b换为密码的最后一位。
安全代码必须是仅由字母和数字构成的四位字符。
Security code must be exactly 4 characters - letters and Numbers only.
安全代码必须是仅由字母和数字构成的四位字符。
Security code must be exactly 4 characters - letters and Numbers only.
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