//https://www.codewars.com/kata/520b9d2ad5c005041100000f

#include<algorithm>

#include<string>

#include<vector>

#include<cctype>

#include<sstream>

bool isnotAlphanumeric(const std::string& input) {

return std::any_of(input.begin(), input.end(), [](char symb) {

return !std::isalpha(symb) && !std::isdigit(symb);

});

}

std::string pig_it(std::string str) {

std::vector<std::string> words;

char separator = ' ';

size_t pos = 0;

while ((pos = str.find(separator)) != std::string::npos) {

words.push_back(str.substr(0, pos));

str.erase(0, pos + 1/*space*/);

}

words.push_back(str);

std::stringstream result;

for (auto& element : words) {

if ((element.size() == 1) && (isnotAlphanumeric(element))) {

result << element << separator;

} else {

char movedChar = element[0];

element.erase(0, 1);

element.push_back(movedChar);

result << element << "ay" << separator;

}

}

auto ans = result.str();

if (ans.back() == ' ') {

ans.pop_back();

}

return ans;

}