#include <iostream>
#include <string>
#include <algorithm>
int main() {
std::string str(26, 'a');
std::iota(str.begin(), str.end(), 'a'); //(a...z)
for(auto it=str.cbegin(); it!=str.cend(); ++it) {
std::cout << *it - 'a' << '\t';
}
std::cout << '\n';
}
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