def lexico_permute_string(s):
    ''' Generate all permutations in lexicographic order of string `s`
 
        This algorithm, due to Narayana Pandita, is from
        https://en.wikipedia.org/wiki/Permutation#Generation_in_lexicographic_order
 
        To produce the next permutation in lexicographic order of sequence `a`
 
        1. Find the largest index j such that a[j] < a[j + 1]. If

def lexico_permute_string(s):
    ''' Generate all permutations in lexicographic order of string `s`

        This algorithm, due to Narayana Pandita, is from
        https://en.wikipedia.org/wiki/Permutation#Generation_in_lexicographic_order

        To produce the next permutation in lexicographic order of sequence `a`

        1. Find the