Write a function that takes a string as input and reverse only the vowels of a string.

Example 1:
Given s = "hello", return "holle".

Example 2:
Given s = "leetcode", return "leotcede".

 char* reverseVowels(char* s) {

     int i;

     int j;

     char temp;

     i = ;

     j = strlen(s) - ;

     while(i < j){

         if(s[i] != 'a' && s[i] != 'e' && s[i] != 'i' && s[i] != 'o' && s[i] != 'u' && s[i] != 'A' && s[i] != 'E' && s[i] != 'I' && s[i] != 'O' && s[i] != 'U')

             i++;

         if(s[j] != 'a' && s[j] != 'e' && s[j] != 'i' && s[j] != 'o' && s[j] != 'u' && s[j] != 'A' && s[j] != 'E' && s[j] != 'I' && s[j] != 'O' && s[j] != 'U')

             j--;

         if((s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o'|| s[i] == 'u' || s[i] == 'A' || s[i] == 'E'|| s[i] == 'I'|| s[i] == 'O'|| s[i] == 'U') && (s[j] == 'a' || s[j] == 'e' || s[j] == 'i' || s[j] == 'o'|| s[j] == 'u' || s[j] == 'A' || s[j] == 'E'|| s[j] == 'I'|| s[j] == 'O'|| s[j] == 'U'))

         {

             temp = s[i];

             s[i] = s[j];

             s[j] = temp;

             i++;

             j--;

         }

     }

     return s;

 }

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