#2651. 字符的前驱与后继
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ID: 2651
Type: Default
1000ms
256MiB
Tried: 0
Accepted: 0
Difficulty: (None)
Uploaded By:
linfeng
字符的前驱与后继
Background
输入一个字符，输出它的前驱与后继。
Input
一行， 一个字符。
Output
一行两个字符，空格隔开。
Samples
c
b d