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  • String Permutations

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    Challenge Description:

    Write a program which prints all the permutations of a string in alphabetical order. We consider that digits < upper case letters < lower case letters. The sorting should be performed in ascending order.

    Input sample:

    Your program should accept a file as its first argument. The file contains input strings, one per line.

    For example:

    hat abc Zu6

    Output sample:

    Print to stdout the permutations of the string separated by comma, in alphabetical order.

    For example:

    aht,ath,hat,hta,tah,tha abc,acb,bac,bca,cab,cba 6Zu,6uZ,Z6u,Zu6,u6Z,uZ6
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