力扣249. 移位字符串分组

力扣249. Group Shifted Strings（移位字符串分组）

将字符串按移位模式分组。此题是会员题。

示例 1：

输入：strings = ["abc","bcd","acef","xyz","az","ba","a","z"]
输出：[["acef"],["a","z"],["abc","bcd","xyz"],["az","ba"]]

提示：

• 1 <= strings.length <= 200
• 1 <= strings[i].length <= 50
• strings[i] 仅由小写英文字母组成