#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <cctype>
 
int main() {
    int n;
    char c;
    std::vector<char> vec;
 
    std::cin >> n;
    for (int i = 0; (i < n) && (std::cin >> c); ++i) {
        vec.push_back(c);
    }
 
    std::sort(vec.begin(), vec.end(),
        [](unsigned char c1, unsigned char c2){ return std::tolower(c1) < std::tolower(c2); }
    );
 
    for (size_t i = 0; i < vec.size(); ++i){
        std::cout << vec[i] << " ";
    }
}

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