编写程序，判断两个单词是否为变位词，即单词长度相同，使用字母相同，只是出现位置不同的一对词。例如：smartest 和 sttesmar。-Write a program, it is determined whether the two words for variable-bit word, i.e. the same as the length of the word, using the same letter, but different positions of a pair of word appears. For example: smartest sttesmar.