You are given a string and you are asked to create a recursive function to generate and print all the permutations of the characters in the string. A permutation of a string is defined as a rearrangement of its characters.
The only line of the input contains the string s.
The output of the program should be all the permutations of the characters in the string s. Each permutation should be printed on a new line. The order of permutations does not matter.