Problems Description
<p style="color:#666666;font-family:Arial, 'Hiragino Sans GB', SimSun, 宋体, serif;background-color:#FFFFFF;"> <span style="font-size:14px;color:#000000;">当User输入一items英文字母后，程序能够按照字母表的顺序打印出3items相邻的字母，其中User输入的字母在中间。</span> </p> <p style="color:#666666;font-family:Arial, 'Hiragino Sans GB', SimSun, 宋体, serif;background-color:#FFFFFF;"> <span style="font-size:14px;color:#000000;">程序Run结果如下：</span> </p> <p style="color:#666666;font-family:Arial, 'Hiragino Sans GB', SimSun, 宋体, serif;background-color:#FFFFFF;"> <span style="font-size:14px;color:#000000;">d</span> </p> <p style="color:#666666;font-family:Arial, 'Hiragino Sans GB', SimSun, 宋体, serif;background-color:#FFFFFF;"> <span style="font-size:14px;color:#000000;">cde</span> </p> <p style="color:#666666;font-family:Arial, 'Hiragino Sans GB', SimSun, 宋体, serif;background-color:#FFFFFF;"> <span style="font-size:14px;color:#000000;">这里假设字母表首尾两items字母是相连的。若输入字母Z，则程序输出YZA。若输入a，则显示zab。</span> </p>
Input格式
<span style="color:#000000;font-family:Arial, 'Hiragino Sans GB', SimSun, 宋体, serif;line-height:22px;background-color:#FFFFFF;font-size:14px;">一items字符</span>
Output格式
<span style="color:#000000;font-family:Arial, 'Hiragino Sans GB', SimSun, 宋体, serif;line-height:22px;background-color:#FFFFFF;font-size:14px;">连续3items字符</span>
Sample
Sample Input 1
d
Sample Output 1
cde
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