Like many families with small children, my family’s refrigerator is adorned with a set of alphabet magnets: 26 separate magnets, each containing one letter of the alphabet. These magnets can be rearranged to create words and phrases. I feel it is my parental duty to use these magnets to create messages that are witty and insightful, yet at the same time caring and supportive. Unfortunately, I am somewhat hindered in this task by the fact that I can only make phrases that use each letter once. For example, a nice inspiring message to leave for the children might be, “I LOVE YOU.” Unfortunately, I cannot make this message using my magnets because it requires two letter "O"s. I can, however, make the message, “I LOVE MUSTARD.” Admittedly this message isn't as meaningful, but it does manage to not use any letters more than once. You are to write a program that will look at a list of possible phrases and report which phrases can be written using refrigerator magnets. \InputFile The input will consist of one or more lines, ending with a line that contains only the word “END”. Each line will be 60 characters or less, and will consist of one or more words separated by a single space each, with words using only uppercase letters (A--Z). There will not be any leading or trailing whitespace, and there will not be any blank lines. \OutputFile Output only the lines which can be written in refrigerator magnets---that is, the lines which have no duplicate letters. Output them exactly the same as they were in the input---white spaces and all. Do not output the final “END” string.